Malicious PDF — malware analysis report

Static analysis result for SHA-256 333575346f89d69b…

MALICIOUS

PDF

84.2 KB Created: 2021-07-03 08:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cf31b5a652f81f80222eab38b4c33a2d SHA-1: 8e6989b94fc0e5561d8e5b9eaca437a975187b40 SHA-256: 333575346f89d69bd7392668ca73a98fdf3a0aa5a261b9ea86204dc12cd8be7a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a73c23aad70962dcfd5bc7e6161a3f80/32486516899.pdf In PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/c0b5a2cf7166964c732498f615754e73/89391247093.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608613573b2c3---sobinanukilabatomafe.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/3f7b82e29fe7c50a726851d71d01fdf9/kinogeberusimalexajonigef.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/42881316525.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/todogisijepikivojav.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/81k88ig6ub1545vf1jr8hshpud/81754223392.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/63502983550.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/qgfp6hso5uiqqqc748vfcuit74/90686676564.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/gowotikipodelebetefudama.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/84153331889.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210611_014138.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55659bb202---mofowot.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/89esd60lf1k6h9l80cl4fd99vf/21049429173.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb6f3d9804---37552892757.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/jifirabijigate.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/97sr9mrf2i6ivsk5l7esjfq5gh/zudukesemitiputudaxuj.pdfIn PDF document text
    • http://www.heksan.com.pl/file/zemixuxiz.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798ed0de5d7---fafelelugatotorumi.pdfPDF link annotation
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3164406ca---majufewa.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4893d179cb51fd58921b58a485459405/77703361394.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/e3c2b348595014bbfa90e6d6f78581f4/49136846896.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/5otoim3h7q726lmnlrg4j6el7f/vidurew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=compare+contrast+worksheetsPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/035bde5bccb34e0aa8bd603b6b438354/tewunudus.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 10712 bytes
SHA-256: 2b1c0eb1de026235f23eb6dbea63c32f410330dd86e2ba5505de434bd1fd3094
font_02_sfnt_off00011591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 17656 bytes
SHA-256: 9d633ad5a1d35f86c3a0a89193da9722ebfc1c07c736e278822ac62738d6d4d2

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