Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a4d4888a1233db…

MALICIOUS

PDF

86.0 KB Created: 2021-01-08 01:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f018f926d9239810427af63fc41d82f2 SHA-1: ef1a477b6fb92df57211b31cfc2ec58a4890ba4c SHA-256: 29a4d4888a1233dbda1c50d3e8e03b895967baa2d177c0a1f10af5a112d878e6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a significant number of external links, indicating a link farm or redirection strategy. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to direct users to potentially malicious or deceptive content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=freemotion+dual+cable+cross+weight+increments
    • https://cdn.sqhk.co/wamitavixitu/ieiidr1/ios_storekit_download.pdf
    • https://cdn.sqhk.co/sojetaji/QCjho85/56358770050.pdf
    • https://cdn.sqhk.co/nodewanase/cjjgiFj/snappers_key_largo.pdf
    • https://cdn.sqhk.co/sozaxejiv/pIjjIhh/zixadiwe.pdf
    • https://sesesisemiv.weebly.com/uploads/1/3/4/7/134746737/lowilejujuwubuwojov.pdf
    • https://jedamebised.weebly.com/uploads/1/3/4/6/134651392/2204600.pdf
    • https://cdn-cms.f-static.net/uploads/4381546/normal_5f979b5ee108b.pdf
    • https://cdn.sqhk.co/bipujawojeli/8Ghgjgx/jeranekuwil.pdf
    • https://xurulojoxog.weebly.com/uploads/1/3/5/3/135323168/rasazozi-xaruv-nuvewugewopu.pdf
    • http:///\/img.iconcdn.com\/Freemotion\/images\/attachments\/SELF_Mag\/SELF_Article_6_10-5.jpg\
    • https:///\/cdn.shopify.com\/s\/files\/1\/1146\/0154\/products\/VFMCS4007_PressPush2.jpg?v=15689130
    • https:///\/cdn.shopify.com\/s\/files\/1\/1146\/0154\/products\/VFMCS4007_PressPush2.jpg?v=1568913028,lebar:1805},{alt:FreeMotion
    • https:///\/cdn.shopify.com\/s\/files\/1\/1146\/0154\/products\/VFMCS4007_LatPull2.jpg?v=15689130
    • https:///\/cdn.shopify.com\/s\/files\/1\/1146\/0154\/products\/VFMCS4007_LatPull2.jpg?v=1568913028,lebar:1274},{alt:FreeMotion
    • http:///\/img.iconcdn.com\//Freemotion\/images\/attachments\/SELF_Mag\/SELF_Article_6_10-5.jpg\
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/difigomisosak/armada_harusnya_aku_stafa_band.pdf
    • https://s3.amazonaws.com/mojivikapeti/code_combat_19.pdf
    • https://s3.amazonaws.com/xijalovelokolep/44272527065.pdf
    • https://s3.amazonaws.com/simujix/tuzolodagizujageter.pdf
    • https://s3.amazonaws.com/naxizugenabi/engineering_drawing_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eb8.bin
9550721f2a2b67fa190e5132ffc437330156774ea91d5c2215e02e14fcf75f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB8 5540 bytes
font_01_sfnt_off0001216f.bin
550ec75f2305eff401a3422ba864e1a4d346b88685c2f3bd2c9e377fc823aa23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 12484 bytes

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