Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74ec8f26332309c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 06:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 948828827246a4e9b10c40e973b2e543 SHA-1: 5280a0a601873bd3cb5a6aad73813606e9c51c53 SHA-256: b74ec8f26332309c7544aa0bdb4b717b4c0a8d78a620ebdd9b65cc9590865fbc
186 Risk Score

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 0.9991

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://resalured.ru/wix?keyword=wii+shooting+games+with+zapper PDF link annotation
    • http://ritual-venki.online/husqvarna_460_rancher_price_australiawbon6.pdfIn PDF document text
    • https://kosonajiwepojig.weebly.com/uploads/1/3/4/3/134373389/49d1e1a.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/gdhjm3c/41343480029.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/gcx9if7/42739085963.pdfIn PDF document text
    • https://divewamekavese.weebly.com/uploads/1/3/1/8/131860060/4928729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452157/normal_6049a4e33f5a7.pdfIn PDF document text
    • http://mnatural.space/men_s_boxer_briefs_patternr4m7s.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/eihqgfE/turejexumirefisije.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388272/normal_5fe3a2282a7c3.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/leluzepexo_wajuv_metukilolozusi_kuwuzolubax.pdfIn PDF document text
    • http://hydrofthol.space/735294306500efuy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416927/normal_60317e3065b4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5fdf900cc942b.pdfIn PDF document text
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/tolarader.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/g2XUVhF/zimiladoboruwon.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/2ja5hhc/razise.pdfIn PDF document text
    • http://batut.space/julopetalotetavekituvmc2zb.pdfIn PDF document text
    • https://litisowof.weebly.com/uploads/1/3/4/6/134692954/ff275a03.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_725138caeb644daf8b88bd27aab6d398.pdf?index=trueIn PDF document text
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_f28682c2061d467f8bf3a6eeebfe9b41.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_f1ecc3e7c2074358b776006550cf686e.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_391a30acea1f46a6b155dd6012f738a8.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_48ecd3f4eed248eda284b8804aa212fa.pdf?index=trueIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_c55b763d79f14a9c90147e972ab27e7b.pdf?index=trueIn 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_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 5356 bytes
SHA-256: be14c345117a07d64a7c1b8f0a05a49adb0d5421093a0c3fe4bb11f7933bdbab
font_01_sfnt_off000102df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DF 10668 bytes
SHA-256: 31fa6ca2e6a6fbdeb0fb182df5d7642072ab029615555de0b2efdc9138c35422