Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb570727c5fcd21…

MALICIOUS

PDF

74.3 KB Created: 2021-03-12 05:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5553cc4603a3734337b1195421ae7add SHA-1: 22bfad60215819a89fa50313057d10b8a1f2732a SHA-256: 5fb570727c5fcd21098ede91e4872e6a5ef53fbc92bd7a58cfe2f40b7232f72f
186 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 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=will+there+be+a+one+punch+man+season+3 PDF link annotation
    • https://rirumuzog.weebly.com/uploads/1/3/4/1/134109041/lopeg_bejegizoxodoma_tezozab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403940/normal_601b03e0c28f5.pdfIn PDF document text
    • https://berapozi.weebly.com/uploads/1/3/0/7/130776213/renigowofoni.pdfIn PDF document text
    • https://cdn.sqhk.co/paxabuxutujo/h26jg6g/wejonokipoduz.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/56583.pdfIn PDF document text
    • https://jolumipeba.weebly.com/uploads/1/3/4/7/134766715/vuzarixuguko_makepewo.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/70a3ef160e35.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/lomepubodepomus.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/1460342.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/egvbw1W/rinurifupifalajurudur.pdfIn PDF document text
    • https://menusopam.weebly.com/uploads/1/3/4/5/134597334/88b6a.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/gjWheAh/duck_duck_goose_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/jM9187C/super_arcade_racing_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_6017ce96b2686.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/benil_beduzujavor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482215/normal_6004f05629a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_6040fca0d7c8c.pdfIn PDF document text
    • https://kegozogoro.weebly.com/uploads/1/3/4/5/134525602/3d69f.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/mhCj2if/drive_in_movie_near_me_showtimes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 5492 bytes
SHA-256: baa90753ebe0bef6b0e1ab8168bf3b869f05b70cdb12fea1c2e85a7e8038bf47
font_01_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 10628 bytes
SHA-256: f6998f439e1e0bd1a38c6ef2756b78d2cf517947a2ea4ae081967b643df3a60f

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