Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0d29b890133474…

MALICIOUS

PDF

81.2 KB Created: 2021-07-14 05:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9bab957fd3acdbc767ad2c89d5b0ae7e SHA-1: 6332ad316cb109d938e705b218ebbfbbdc92799f SHA-256: 6e0d29b890133474ae7db6cf9490b76a328a4b41e27cbcddd9a37b770b1ed1e6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload directories, suggesting it is part of a phishing campaign. The presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic indicate the document's intent is to trick the user into calling a fraudulent phone number, likely for a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0eb27b52---61648588995.pdf In PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/61d82b8e84694b8a6f9d38b1ac28d082/nadowemoxawik.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/57950341739.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/73448192075.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/9a8976181527d2210be5800f115b919b/vutazebamowixadudewa.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/rujiwirosek.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/16583538694.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b46fc2dec---1036347999.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/24227328185.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/77865012278.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/ba203c92533ce574123ba11b2eab10f2/vofosidevulosapux.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082ca0db776f---22145267774.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f5b84a32---25477770128.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608715230abbf---67375627701.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1rso60hhobgc7ns1aftsnerr2p/fibililegetukimagulasab.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6bc83ca75---91514161983.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/86e51e28b064bc5cfff727288c7bdbd9/11452640767.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/64806837383.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/90e13i1pbhm206thieg0itvrr3/43229869154.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/80975226050.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/aa2281f64b503d21ac0d6b0a13799998/dizazubosewonot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=united+hypermarket+hor+al+anz+offersPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC3 17292 bytes
SHA-256: 10b92ccae6077c0ddddbe99c5c3d39f3c05d27649e033502ce33f576b4a4d8a2
font_01_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001042a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042A 11036 bytes
SHA-256: d581ac4ac97a62e914c650fd9f53311d9db87395316b5067429df78db3e7fab4
font_03_sfnt_off00011da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA8 17296 bytes
SHA-256: d8da12e84a8511632331b33fc2cf04516f92456d00912aecb38e361fe1b079f1

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