Malicious PDF — malware analysis report

Static analysis result for SHA-256 330a0e97075496fe…

MALICIOUS

PDF

85.4 KB Created: 2021-01-25 18:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5f711492ab23df1365e3cd180a4890bb SHA-1: 749b388c3184f72582ac3c4ab7a4e2ef7b753b1e SHA-256: 330a0e97075496fe2f7bf787dd50dee0652fb60ec1166d3654fff1a8aa31ee3a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains or subdomains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document, likely delivered as a spearphishing attachment, that redirects users to potentially harmful content.

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://druttle.ru/123?utm_term=american+baptist+college PDF link annotation
    • https://cdn.sqhk.co/zudatona/hhmjeii/neighborhood_market_sunshine_springfield_mo.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvomafoda/2hbifNt/nails_designs_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/idHUaNI/maze_runner_characters_hogwarts_houses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5fcc6df257698.pdfIn PDF document text
    • http://nat-fru.space/tepareropedr3k2g.pdfIn PDF document text
    • http://persequenteamsohbet.com/download_buddy_toss_mod_apk_android_150r2y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476140/normal_600e52b69bf28.pdfIn PDF document text
    • https://cdn.sqhk.co/xurunesijud/idujiXA/14784700568.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/yRlbzgi/wings_financial_mortgage_rates.pdfIn PDF document text
    • https://gitemeloduj.weebly.com/uploads/1/3/1/4/131406811/24d28696e9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389570/normal_5fe124381ff20.pdfIn PDF document text
    • https://lexilovomab.weebly.com/uploads/1/3/1/4/131452944/warok.pdfIn PDF document text
    • http://rkconstructionsucks.com/within_temptation_faster_isle_of_man_ttddl4n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd77e3462203.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/j93hcD3/yandex_music_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/TjeKgfC/glow_in_the_dark_drawing_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5ffea87adf043.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/M7GxOie/46264804821.pdfIn PDF document text
    • http://jilet1.club/80255705557k9xsa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 5168 bytes
SHA-256: 73d997393c7415cb66707b2410ce355d5467427584c14870697a920ec78ce585
font_01_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 11072 bytes
SHA-256: 77d47b0e7cb12f9bbe05747b2bbb497e91ef482e58c67a8d27e79a0f521f3adf
font_02_sfnt_off000139e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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