Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab3780f661715c3…

MALICIOUS

PDF

61.7 KB Created: 2020-11-09 22:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3be44e923ce928270b7ada6b077cc2c1 SHA-1: 23db962b493f65a8ff31365d903c3d6b20c81a3b SHA-256: 1ab3780f661715c39419c9d6bb179b278c7da26e5d9d6e2b676caf57efe589a3
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 0.9997

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://traffset.ru/123?keyword=words+beginning+with+stick PDF link annotation
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/9877512.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/difegazixar_dexugavojodewod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5f9988e0555a0.pdfIn PDF document text
    • https://toxavikosas.weebly.com/uploads/1/3/4/4/134437834/rawijexevuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f903aa41719f.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/jeduzizonox/acadia_national_park_hiking_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87ae66b-b032-4708-9b17-b9e8e76fb4df/34584540670.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/vocabulary_worksheet_factory.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/icao_annex_1-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/xumobix.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/cataphora_anaphora.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/affordable_care_act_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/how_to_increase_your_own_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/sims_4_starlight_accolades_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/25143817425.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_off0000b43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43C 5268 bytes
SHA-256: 4b2166a34d83c146164a6b5345b126d3f7cfa192e9c3bc8c089186bbdb56ea85
font_01_sfnt_off0000c63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63E 10724 bytes
SHA-256: bf89675dd9ad5d63d7a700fdc06d92f58508ee99e0f5c8d8c2c1b38e853e160c

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