Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d120d48cf7cc59…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 01:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 43ee2cf12890f0e770b28ab22b9ac17a SHA-1: b9e219239e216b1024d5cb911c4717b03a2895a3 SHA-256: 94d120d48cf7cc59b011816572d21b6254afceb51dd97278aa8088ef81f0d0cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple compromised websites, including one hosted on a compromised WordPress upload directory. This suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://leebyunghun.org/new/upload/board/files/wibovumajolesisemi.pdf In PDF document text
    • https://balaji-technology.com/userfiles/file/xexebefoxugoxeti.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/71330565263.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/detuluragozejewivodowek.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/gefasu.pdfIn PDF document text
    • https://bdcomunicazione.it/file/92888970734.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/74672774291.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4fc8c954fec6eb4114b8c61cd856b237/tekojidugomamip.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/43736652653.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/76971618151.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ht6i4k58h7oneakd2th69rj8o0/zarepozizamuvevesevezoxup.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/tirikubujozasu.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/aea40b5966ee219d7a64bb8f14c677af/xugugazebukagazejowafu.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/73707116207.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/9b179061ee07ac9d49c9282756b3fb9f/89061524860.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0senmgio3k06jshbjfmg1b9fuh/79282323207.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/nuvuzovapanopifokagexovo.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/65ge89krl36n1utkjjvi1b5htg/bokumorebajigelupugoweja.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/wazegul.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160759fe41c07f---54499600429.pdfIn PDF document text
    • https://educhina.mn/editor/files/74461444841.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/58270250629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pulsion+picco2+service+manualPDF link annotation
    • 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_off0000d612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 19136 bytes
SHA-256: 69ef75415cdbada31e65f3cb836a6f436bcccd05390334dd5d271b0e05161968
font_02_sfnt_off0001205e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205E 10724 bytes
SHA-256: 965808c2ca2a24a438e5108ad8ea34eeadf0e37dfe56b23e620c6ca860fe4606

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