Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b6f68c2290ab3a…

MALICIOUS

PDF

91.6 KB Created: 2021-07-14 00:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 36189f7afe113759f65b2ac4288b097a SHA-1: 0964246727fa41830fa48a1c9e815397f0454372 SHA-256: 96b6f68c2290ab3a52a7da1116dc210774cdd839c4d3e6fe95b210eaf62ed508
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress installations and disposable hosting. These links are designed to trick users into downloading further malicious content, likely malware. The ML classifier strongly indicates maliciousness, and the presence of link farms and random URLs supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pistant.ru/uplcv?utm_term=hotel+transylvania+2+full+movie+download+in+isaidub PDF link annotation
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/9ocr1tp33rhubd254mt8e4bmv5/motisesesezorasakulujubo.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160801504999fc---72832018919.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/or3lprlmoido9la9q7a0pn1qf2/7553874531.pdfIn PDF document text
    • https://x-software.cz/data/file/56206676289.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210618021416495.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2083bc3b6a---46312587038.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0d209dd97---repidonesorezijagixapam.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607249a8481dc---bojanumej.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/50vfmsibfp9d31i4dh3qoqh1bf/pikemolazupunu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2gqjsu9ph6eckqqv6i5b98gm55/jozejekukuzurarupes.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/60212403137.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/litudosevavuliwi.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/df0qdov9bpgjmqeda6q9aj1em8/rubagepuf.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ajk1lbeqs74oovqprnmbgogno5/sezuruderusutawaxok.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ebome4nieo5h2c5q21t2i1bh9t/mudinenusoxabadezebov.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/joruxiz.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/juroneb.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/xotegivir.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c6ff50ad0d902f2593211b9d0a9f095e/20705135127.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/koworomepugufoxiwewukipov.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/sibigapapi.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/bukagaxajisilidiser.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607618b7120f8---64942799505.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9d544e9187eff27e26c7c4ae00914976/94117360036.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c00423d442f---tolananesobomixo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 17912 bytes
SHA-256: 0e07fb1adf603b96abf555aff3e2104f7c8fc5616fd7202c9c85e2376d8c1a44
font_01_sfnt_off00012e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14688 11132 bytes
SHA-256: a16065f05eff60cb07fd3714b0db3364d28121c2b3725dac17ec63f2149e129e

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