Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9e684363a25677…

MALICIOUS

PDF

85.8 KB Created: 2020-12-28 14:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e93fd9f81c3eaec1e9910000f6031afb SHA-1: 757ffe2243b539eb2df723d1b070c89ca8e877fa SHA-256: 2c9e684363a25677a81208387e2e1cc578f07435e03bcc0ab6249af587d7dec3
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, alongside a high number of external links suggesting a link farm. The document body, though heavily obfuscated, contains keywords related to 'free followers' and 'no downloading apps', aligning with a phishing or scam lure. The presence of multiple unknown URLs and a ClamAV detection further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=free+musically+followers+no+downloading+apps In PDF document text
    • https://cdn.sqhk.co/mekekomubun/QdicBid/98079212304.pdfIn PDF document text
    • https://gekizunelim.weebly.com/uploads/1/3/4/8/134883517/5ce94d8eb066ed.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/CjjlhaZ/love_nikki_dress_up_queen_codes_june_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5f9cdcf9d7518.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/jf5jejb/vovedepip.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/iybDidY/sukewibap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_5fdff37fafb9e.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/1ia6xOX/vojefepexakoxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9034b2e4-8e4f-475a-a73e-e90d532785a1/mamurovubetafisoreki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e5b4d1-bb6e-443a-962a-290268ecba0c/79025921161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035209fc-a4a5-4986-85f9-c8351b174b64/kapudikanemimebapow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b61c72f-bfd2-431f-849d-6397f3d341c0/23285143996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5847a9f8-6d4b-4dad-ac16-c6c4bf6732c0/2_players_games_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2506fc-f455-40fa-b9fb-4db2e0c5541e/culinarian_ffxiv_gear.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 5624 bytes
SHA-256: 61f3500214bfee7e9f9b314f73db2771e6e002db622ed9c54c71f6815b28cd5c
font_01_sfnt_off00010e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 11068 bytes
SHA-256: 2b5852e6f8952b0d1f3859664dc441a7d43bc27c8d8314e4ad34d353609670f4
font_02_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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