Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80d27f9b48ca5eb…

MALICIOUS

PDF

98.8 KB Created: 2021-06-03 08:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 008d02bac4ae633e14cabadf626f63c6 SHA-1: df6f7769f5f513ed381bf593d0ca93dac030003a SHA-256: e80d27f9b48ca5eb094915494f865f446dc72dc33a00b3172c0fcd9268344947
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML heuristics strongly suggest malicious intent, classifying it as a phishing or trojan. The presence of urgency and callback lures further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/pbw?utm_term=arcgis+10.7+manual+pdf PDF link annotation
    • https://nidunojozat.weebly.com/uploads/1/3/4/3/134339088/9e62c.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/4897997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423171/normal_6003e9d8cd311.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4392444/normal_60b78ddebe0c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_5fcbd31e46235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5fe3aed0cfde0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ff9f4d8de69b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426834/trke_photoshop_program_indir_cretsiz.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144470379/totally_accurate_battle_simulator_free_download_2020_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e647d66-cf06-4e5b-9360-88d521c8db09/dekerugoxitukidolef.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144426618/is_foggy_brain_a_symptom_of_covid_vaccine.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144485625/60073799125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f46ad5-3a0d-4ab8-a7bc-f7b4dfd7cc13/1988_ezgo_marathon_parts_manual.pdfIn PDF document text
    • http://zewalar.pbworks.com/f/what_is_the_exposition_of_the_yellow_wallpaper.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144508767/60183375379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45269da1-d339-41a6-86a0-d0d077fedf13/siraxegoma.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144483903/are_there_carbs_in_bacardi_limon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b0fb59-916d-498e-848f-428e421427bf/5th_grade_math_expressions_homework_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3acb358-31c6-4137-ac09-b370a529fc30/why_did_my_water_heater_keep_turning_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faebde7-7c36-4465-9f3f-068f0d1b9fc4/basic_health_physics_problems_and_solutions.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001448a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1448A 5772 bytes
SHA-256: 21df0ffde2cb350113ed76417a2b178bc448b1fd977007cbb1de53301f512874
font_01_sfnt_off0001582f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1582F 11192 bytes
SHA-256: 5f9643e5791e5f0993c5ef8b0776117384d4848047e4d17ea489cf71fb998f43