Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76f68c5fdce0738…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 00:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 70e471d0b606a51da5d28849beba7a19 SHA-1: 5db0fd0986b8704bb009a2b09cc50461faf18247 SHA-256: e76f68c5fdce0738b1c406b75467224f7922dbd2cf67f8dc5e2282de9dcb5338
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and a URL suggestive of a phishing lure related to driver's licenses. The presence of ClamAV detection and ML classification strongly suggests it is a malicious PDF designed to trick users into downloading further malware. The document's structure and embedded links point towards a phishing or social engineering attack, likely aiming to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://infrive.ru/uplcv?utm_term=texas+driver+license+with+b+restriction PDF link annotation
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0f763bec---sovenutazi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e94a43b7188---bonebomanovagajasuxikexud.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c4191b7824e---37621066295.pdfIn PDF document text
    • http://jaika.in/images/documents/files/famavuxiwoxoxugipifugize.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c3eaa5c4aa69bcfaf4f403948a4303b9/wufoxejolisibiretapozalex.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961873931fd---95590986042.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a052cb2b024---29390588808.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/rubobujafud.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/nusukabomesavusuxudije.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27e5b2b9d0---40620632275.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/21849081907.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/9tvmp9fqeuf0ut29tu4qeiag20/mezimeg.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc129790af---xebasapuw.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/xisedotokedajasabu.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210529072419.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/gasobawekojuxam.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de6bb8ae2fa---wasimotugebogajetixiwu.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/soxedegamasaxiz.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/xileduxurejonoluf.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/zizovubo.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fedfa4f608---10923096985.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/biroxunaveran.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/xutidisopuvafimajewefiv.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_off0000db32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 16468 bytes
SHA-256: e025586709f7a3b768fc68c6214ac73a04e17227c446de3b1a0c1a87025816a7
font_02_sfnt_off00011dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 10824 bytes
SHA-256: b7b7bb9669c97e8fab3888c712dd409a7c6841d26f343b6acc92eb05c4293d08

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