Malicious PDF — malware analysis report

Static analysis result for SHA-256 1960157649227e2e…

MALICIOUS

PDF

77.6 KB Created: 2021-06-01 02:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4ccaad0152cd946e515d78a7eb85527f SHA-1: 5ebd13403374787c4ed55dbb60096bd51f9f2d77 SHA-256: 1960157649227e2e96812b789634744a9bbb03fbd4cd34a5b0ba3dc5e947fd09
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://huntic.ru/pbw?utm_term=guia+de+metal+gear+solid+5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462976/normal_6040dee6c9d9a.pdfIn PDF document text
    • https://nexonurobev.weebly.com/uploads/1/3/4/3/134371674/ziwitorevebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383165/normal_5fc7cda61e08a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_6066ea6ad8f9a.pdfIn PDF document text
    • https://punerumoluzes.weebly.com/uploads/1/3/4/8/134897399/lajulejazutag-vuvixi-mibawusum.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4381083/normal_60b1dd9683e1a.pdfIn PDF document text
    • https://juxewuvolexi.weebly.com/uploads/1/3/4/1/134109000/lenimazo.pdfIn PDF document text
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/8c5683fe4d281cb.pdfIn PDF document text
    • https://nusuvonofa.weebly.com/uploads/1/3/1/8/131872273/retemewutijeterap.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/8143b61f-bd88-4708-943a-897d37e80140/techno_pave_touch_screen_watch_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1859d423-e504-41d6-9be2-a32e3d743696/patowesibezesegajijefipis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c86b263-bb3d-4dca-a8d1-9e1e7778146d/16524825839.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144414627/78988878861.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/vixiwiropagawuwuwitonizuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd9b9e0-9e55-46cd-8aef-b3666970271c/what_to_do_when_car_ac_is_not_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67dfc716-3d36-4ffe-a86d-505954bbf3fb/43559651864.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/f/faguninusufilopod.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144419436/35090846562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b895255d-87cf-4372-a074-9899fe3a8911/meduregarofafutedikosidiz.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_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 5300 bytes
SHA-256: 171fbc1e1762511fa72a2cc323e34bd8fa529b8386944a89c8cabee8c69e373d
font_01_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 12320 bytes
SHA-256: 24ece6cbfe93e6258cfad3bbeb0add49b993901fba814395336794435f46fe95

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