Malicious PDF — malware analysis report

Static analysis result for SHA-256 585ed208212f6350…

MALICIOUS

PDF

94.5 KB Created: 2021-04-18 22:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ef58f18a3a346a14cfeab99206351e SHA-1: e8630a2beacf5af5293a618c9669de46316dc05e SHA-256: 585ed208212f6350bf3e52008905060a99f086a979fcc41c0f11c5452299ee7e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it contains a link farm and an external URI, likely intended to redirect users to malicious sites. The document body, though malformed, contains text related to a '2007 chevy silverado 1500 service manual', which is likely a lure to encourage clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/strik?utm_term=2007+chevy+silverado+1500+service+manual
    • https://cdn-cms.f-static.net/uploads/4404965/normal_601995af9954a.pdf
    • https://cdn-cms.f-static.net/uploads/4417315/normal_60607e879cac0.pdf
    • https://cdn.sqhk.co/xewimoziwuvo/aghUXOk/horizon_4_rx7_drift_tune.pdf
    • https://cdn.sqhk.co/bimeniwog/jaihAie/xozezenopimu.pdf
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ff90697af03c.pdf
    • https://cdn-cms.f-static.net/uploads/4506170/normal_60641a87e6014.pdf
    • https://static.s123-cdn-static.com/uploads/4367304/normal_5fcd917e57b5d.pdf
    • https://cdn-cms.f-static.net/uploads/4369323/normal_6025b29358cff.pdf
    • https://cdn-cms.f-static.net/uploads/4482858/normal_6066cb691344b.pdf
    • https://cdn.sqhk.co/nobixapo/cxhjKgh/35861946562.pdf
    • https://cdn.sqhk.co/dogilijesiwu/higCn9e/50529514252.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_54fd2a369a0147b7bacc533394fa784e.pdf?index=true
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_46ea6a7e1a584e66ad8891f78ab24e36.pdf?index=true
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_58c3383430bf4f48b2e1e32732c45e96.pdf?index=true
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_85f603f4ebd54fb8890df1942c15b37a.pdf?index=true
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_8191a68dd8404d1e88b6d5326fbe116a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c21cbe55-5ba3-4ce0-971d-60eaa5d48574/nuvote.pdf
    • https://uploads.strikinglycdn.com/files/18aff61c-0273-4e9b-bf7c-d6ee1ad2c843/what_foods_should_i_avoid_with_ibs_constipation.pdf
    • https://uploads.strikinglycdn.com/files/1b20a4be-a733-4844-a4d7-d88852ac02e4/como_hacer_un_taller_de_lectura_para_adolescentes.pdf
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_e0f1b9143c9e4936a5b13a7c242ed464.pdf?index=true
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_38d4acb85e55496fa62a54aa6a2630ad.pdf?index=true
    • https://uploads.strikinglycdn.com/files/237d8bb3-cd27-400e-b0b3-37958dd7afb3/free_checklist_for_building_a_new_house.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011973.bin
038e65b533762bdca612f73a7884d0034f5c4125000d9a80bbf7a6c2b8b1f2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11973 5776 bytes
font_01_sfnt_off00012d0b.bin
06a9a32e82b09fbd9bfe516a3395ecd6df881623a3e79134b2e482ff86ec79ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0B 10656 bytes
font_02_sfnt_off000151bf.bin
eaa1956999cf9ac80005ccc3a522ffcc6f692c0d5492fcb5d84e3d6c9fc2431e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151BF 17752 bytes

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