Malicious PDF — malware analysis report

Static analysis result for SHA-256 154279a9fc17a22c…

MALICIOUS

PDF

78.7 KB Created: 2021-03-29 21:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32eb3a009e6d9b26ea844550c74e8306 SHA-1: eda10c6199fd4ace84e3227f11c1166c7034f1ed SHA-256: 154279a9fc17a22c863b0187625be91168fa23891ac88b52c8dd4d69fcac1296
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's primary purpose is to redirect users to external sites.

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://resalured.ru/award?keyword=audyt+wewn%25C4%2599trzny+podr%25C4%2599cznik+pdf
    • https://cdn-cms.f-static.net/uploads/4448976/normal_600a057e07f2f.pdf
    • https://static.s123-cdn-static.com/uploads/4401989/normal_5fdfefc11f0b4.pdf
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/8514532.pdf
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/lelatoda-nunasiv.pdf
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fdc0ab326be7.pdf
    • https://cdn-cms.f-static.net/uploads/4494166/normal_602d716706d6b.pdf
    • https://cdn.sqhk.co/jurugaguvedu/iaiggiu/15500390768.pdf
    • https://cdn.sqhk.co/nukusigemug/qgehgSr/filorediwubirufiwawufalu.pdf
    • https://cdn.sqhk.co/gujipiror/gdgd8W4/subway_franchise_for_sale_in_florida.pdf
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/8b4d1d.pdf
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/86b821bb3ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tudibakigar.epizy.com/visual_studio_2019_shortcuts_cheat_sheet.pdf
    • https://uploads.strikinglycdn.com/files/7f16259b-a9b4-45e6-9eb3-f9551a8e6790/dukojolajulozuwa.pdf
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_15d2fbfef9f94f73b83d1ed10353d935.pdf?index=true
    • http://puwolir.epizy.com/transformers_2_list_of_autobots_and_decepticons.pdf
    • http://dikawuferiwa.rf.gd/salaja.pdf
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_212a16dda6e2430d8761dca9c05bb9e8.pdf?index=true
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_e5a974b4d9e14a929390b188e003e170.pdf?index=true
    • http://sasoregasot.epizy.com/81819167207.pdf
    • https://uploads.strikinglycdn.com/files/c88e7fc5-e2b7-4a41-9111-e36b80c79267/89681607705.pdf
    • https://uploads.strikinglycdn.com/files/4926109e-ff20-4c5e-8d4c-69fea2cf5951/75638189485.pdf
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_98921f5dfc0c45afbeb3c69d4fd2354e.pdf?index=true
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_cee8959bea0a410fb6d996210d464af7.pdf?index=true
    • 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_off0000f3e6.bin
d70dd64be6c4b725dfbf05879a41cdfc83988583866bf59f1a02a33af8e0536c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 5208 bytes
font_01_sfnt_off00010593.bin
69934b6b4a2e48344a6c942df9b9e9d9720ffc7e071b00181bb990955ee69dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10593 11844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.