Malicious PDF — malware analysis report

Static analysis result for SHA-256 9832a28417144878…

MALICIOUS

PDF

110.5 KB Created: 2021-08-07 23:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52ed6b2a3b5a35b9ea6b3b6352ee5063 SHA-1: 0aab3ac745a416988c26bafbe9bc9cdf8b6f16f7 SHA-256: 9832a2841714487838305da5df174f13bb1106ac5c9e90fde0173e73cd6de150
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely to lure users into phishing scams or download further malware. The presence of multiple external URIs and link farm heuristics strongly suggests a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=legend+of+zelda+nes+online+unblocked PDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7efe81ec91c07565f35d6751e79ff3d6/durusemolujulufona.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/6k5k62b9fkl8bqp7hd73mm608v/84324665385.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/zivezelizipafibokux.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/68726642627.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/wedotofobekofikadinuxe.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/292302076005.pdfIn PDF document text
    • https://windsbs.biz/files/file/11700911227.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/3889897811.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/gjoqamdc1dc430focnu06o5l13/9756936177.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/96465b17b647616a3175682255921b4c/41988353976.pdfIn PDF document text
    • https://tonitomov.com/picture/file/mesabosi.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/56935227040.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/volijiberezofof.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/78898916613.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/77e2841a280ca2a4cbc58a9d07858e93/32092852907.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/vixunosezefevozasidusofo.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/15171235367.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e64f1bce---jibaluvegonobotedabi.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/53654639903.pdfIn PDF document text
    • http://mousike.it/img_ins/files/78603469391.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85a1594c91---pudabokofonunad.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/12f260b6d117673298b31dda7aaad6fe/zinitesedavejawideti.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6df78356---2094887894.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/kipilewalase.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082330ae68b2---zozukoxarokapudososa.pdfIn PDF document text
    • https://marigabung.com/contents//files/mazoxaxenodagimugakesalel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001205f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13871 18328 bytes
SHA-256: d46ea0e71760f1745ba667a3c2c8a4ad58bcc526fe363306bf9d9f1d52471d7c
font_02_sfnt_off00016814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16814 10804 bytes
SHA-256: 4bac407d7137c103b3f577ac3ee9612600a4abfc64d0a0fd0330b07094ebccce
font_03_sfnt_off000180df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180DF 13440 bytes
SHA-256: c34466c4dc6cc8e4a2907706a8dd796d25012b9f8727848fe139f1c509082556

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