Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0304cb07e03cb7…

MALICIOUS

PDF

100.7 KB Created: 2021-07-01 21:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 16309570910520c00aa4b12df3cbe896 SHA-1: 32f7f0c38568cd23084dfd52698d96c5ac9623e9 SHA-256: 0d0304cb07e03cb7fd77c84ecb112369ac47a0339490cbbbe30e75131b547c25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malicious content or phishing lures. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to a malicious second-stage payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/pcs4bap1sv192n99ao8ue48ff6/95018899975.pdf In PDF document text
    • http://highendschmiede.de/highendfiles/file/16186929115.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/vakubitaz.pdfIn PDF document text
    • http://rld-carbon.ru/file/vadefurifasudanofoxo.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160908b1c786e2---muxurupezalidomis.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/d24brb0uiql4floov94gp9lfj3/60943758161.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b058c0a130e1df870d5fec207d1696bb/87474584417.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/sirilebazebuparimuzulatu.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948753445c1---fobobutiratologidifu.pdfIn PDF document text
    • https://areicon.com/images/file/69136356040.pdfIn PDF document text
    • http://hncastlecable.com/d/files/pexenefamogipusin.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/17737803348.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/mamevi.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/mexuvowij.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8d591776c1664375ca17575fb1bdd154/leluv.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/sojefediliku.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607531ddb6278---23422493407.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/4459fc5bd13c0804be5173da6b7d48bc/veruxeresozokexuvevi.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/98981885103.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/71549549758.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/1c425894975048246025d882afd44b58/sikejudamik.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/xaligidase.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/99701501603.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=mission+impossible+fallout+4k+streamPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a0f3b39f1---23040587181.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_01_sfnt_off000118db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DB 10920 bytes
SHA-256: a0e7f144a7935921f7797e178a69b1cfb41658d69e6c67697c0851a880091615
font_02_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_03_sfnt_off00013a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001525e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525E 18548 bytes
SHA-256: 2d772fde5b73805770533ef34be37634370d1bc47d1cb928b662fcbccc1d5c11

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