Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1d6424e4496ebd…

MALICIOUS

PDF

76.0 KB Created: 2021-06-04 16:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7ed990399869fab3d688271dbbd077ae SHA-1: e8559c2bbe11c16934382ed1a1f362edc8ad019e SHA-256: 7c1d6424e4496ebd283a68ecde6a06d28fd262aa2a1e35ff1027e4a22b4b566e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that redirects to a link farm, suggesting a phishing attempt to lure users to a malicious site. The document body, though heavily obfuscated, appears to contain keywords related to 'Duraflame electric stove instructions', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://garglob.ru/pbw?utm_term=duraflame+electric+stove+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376852/normal_6047b1b2762be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_5fdc327d7d1e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fcdcb0adc120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_605635bf3b0a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_603535fde1f44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78e58b3-231c-4e55-a40f-fd2ca4098120/singer_solution_to_world_poverty_citation.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/que_son_los_postulados_de_koch.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/56672569474.pdfIn PDF document text
    • http://mukonisu.pbworks.com/f/oraciones_subordinadas_adverbiales_causales_resueltas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b3b47b-d149-4e8b-a136-d1133f269ffb/soboxenivatavokabegirono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4735362-7934-4eab-8aaa-e4b7a95455e2/interview_questions_for_financial_analyst_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e2c925-974b-400e-afd5-1efd9f76c2b5/65216240664.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/rinorozawedenajoz.pdfIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/12735846613.pdfIn PDF document text
    • http://kizisoj.pbworks.com/f/jiwiwivud.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/89276419054.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144529113/triangles_semblables_exercices_corrigs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bee6c0-e243-4af4-aa9a-e774e9275eaa/23746768749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc07891f-3d9c-4a6d-9f1c-ac85037036d2/doss_soundbox_bluetooth_speaker_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9669b0e0-9029-41fd-b9ac-4b78143e3d0c/pawufebur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e08dbec-96ee-479f-ad0f-8e55c41a9f3e/running_records_analysis_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f058b6d7-9018-4fbe-ba75-75a65e3697af/what_are_the_requirements_to_be_an_army_ranger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893f377d-39f2-4648-b3ad-d446493e269c/nordictrack_c_2450_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3c7a25-63f3-4102-bc13-558abc3a79c0/69991989651.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5088 bytes
SHA-256: 25adebc2fd9e2261f45cafcaa15506fcc3da665aae4c0ae14d53c7461bdf0bba
font_01_sfnt_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 10704 bytes
SHA-256: 96fbd02e4c631d961dd818f9428c056a172a444f63c6f4ed89d45da8b89dd4fd