Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4353ef466b39f7…

MALICIOUS

PDF

93.6 KB Created: 2021-05-24 08:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5bd919b3056163522da6fda119834ac7 SHA-1: 36c94cf1ab8b66aa5650a84a1f478ccbc6e10b49 SHA-256: 3c4353ef466b39f7e2e8d6d3cc5635b1408c98236581fec613e9929760287022
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://dugedepap.ru/strik?utm_term=what+do+you+understand+by+indirect+democracy PDF link annotation
    • https://zuxoviwizazuma.weebly.com/uploads/1/3/4/7/134737549/pivowagufilemu-fuveposotawe-fopixilezagipa-zewodelo.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/jedomusaze_majasap.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/sodilepudejadi_ravurotizizexa_fejakupazadil_doved.pdfIn PDF document text
    • https://butabapob.weebly.com/uploads/1/3/4/7/134744569/7023c311dfe62.pdfIn PDF document text
    • https://veselamo.weebly.com/uploads/1/3/1/4/131452803/rixax-nafijedajer-zefilo-fejoxexonofup.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/799f999a8f2920.pdfIn PDF document text
    • https://kasugokadudibuk.weebly.com/uploads/1/3/4/7/134740653/5597452.pdfIn PDF document text
    • https://pixasarajesuwov.weebly.com/uploads/1/3/4/6/134688766/825433.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/satulibaren/xivazonesuxavuxagujixas.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/is_there_going_to_be_another_eragon_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/where_does_steam_workshop_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/59717079811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bec95d-8b6c-41bf-9692-0b8344fa784a/61249199952.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/windows_10_disable_software_reporter_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/51947316509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c1c33b-c77f-4181-b127-565fd89f2a6c/is_the_canadian_justice_system_adequate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8500206-461f-4bb2-8023-389a16576b54/my_beloved_world_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42595284-c6fc-468c-b1c7-9d7b72fedf42/best_flight_simulator_xbox_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864e048f-6e7f-44d2-bc0b-a5a8e872ae22/34739327082.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 5400 bytes
SHA-256: 31c9dc956779a2dadfdb6bce5c7b9aa053d8fdb1cf33ddfa1daa70c4bca93caf
font_01_sfnt_off000144d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D5 10440 bytes
SHA-256: fd2a775944477b8d6f48b5f2808b5b8009468d3d31bc77b8a026d9afa4022d17

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