Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c0d1d2f6159a30…

MALICIOUS

PDF

87.5 KB Created: 2021-08-11 17:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 95ea88365048f6a4fc2a49c18f6f056e SHA-1: c10eb9bdc1b9372ad25f9cc54b005aea76b3798e SHA-256: 80c0d1d2f6159a3084c1254ebab9b7695ff1138175bc31250cd60a57623fa1d3
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data T1056.001 Input Capture: Keylogging T1056.002 GUI Input Capture

This PDF document is classified as malicious and exhibits characteristics of a phishing lure. It contains multiple links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of heuristics like 'SE_MFA_LURE', 'SE_CALLBACK_LURE', and 'SE_PAYMENT_REDIRECT_LURE' strongly indicates an attempt to harvest credentials, abuse multi-factor authentication, or trick users into changing payment details. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://retailcop.ca/files/87794148660.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c08b7352---83742874355.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/982a47d9c00e73a141246c13a52d3198/56791483811.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/g5caht8mhrm3sdvdtb5jta3c3b/mebowinod.pdfIn PDF document text
    • https://pmms-online.com/assets/file/wuxudegigokerikolubukejar.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e0fafeb4947a7ee834e2124f5c9b0ee4/setelugutubelutasi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d323dffc---lijolezexokilepi.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/76080561214.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/xaberowizuzagizugajib.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/bd0646b08a102cb89ad9fd2a93b9caa4/24448707501.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6dhgj23u1ejentjgp3n414ucjt/jigamowuwonipe.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/62074604707.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610404c7651a2---15598512027.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be947e26357---89316793907.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/72394972492.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea2c279d6---2614052797.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/29/file/90054547249.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/ranozogoramofabenasox.pdfIn PDF document text
    • http://cedarvalekansas.com/clients/875954/File/pivifekizegovebifebokilid.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/45889917103.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/vuzabar.pdfIn PDF document text
    • http://acril.ru/ufiles/files/kuzizifapedupegevunasudan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+you+find+the+3+digit+voice+response+numberPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 17136 bytes
SHA-256: a2eda5760ed6a61f19823073760060d396fc500b5b297e5c805c1fd90692c1be
font_01_sfnt_off00011dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 11528 bytes
SHA-256: 60fa18817904d900e6a35393cd4d8a2cedd016599102b4c598bf01bb29fde9ae
font_02_sfnt_off000138a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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