Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2bf88b50757bb7…

MALICIOUS

PDF

77.6 KB Created: 2021-01-10 06:25:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 95ff7138d9e7daca37fb61ae80768e04 SHA-1: 7d84195374e343a1eb40b1045eead4eb050b5fbd SHA-256: df2bf88b50757bb739e9f998e5475a1ccf8d922bbbca73534f4b19a185300563
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The embedded content, though heavily obfuscated, suggests an attempt to redirect users to malicious URLs. The primary URL identified is traffnew.ru, which likely serves as a landing page for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffnew.ru/123?utm_term=verbos+regulares+e+irregulares+en+ingles+y+espa%25C3%25B1ol+lista PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403266/normal_5fa3d75d0a05c.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/iHEgfXx/3243321494.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/a27a2ab1.pdfIn PDF document text
    • https://site-1178448.mozfiles.com/files/1178448/pokasegekijetofulabet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5fae95fe2db50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5f964e29d02fe.pdfIn PDF document text
    • https://cdn.sqhk.co/zagusebipin/hjjcyie/1108781496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5fa769cb3c9e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418556/normal_5fdf2f61e3a41.pdfIn PDF document text
    • https://zixobidepupakog.weebly.com/uploads/1/3/4/5/134503699/f9f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_5fd66e054ff57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resisuna/paulo_coelho_audio_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/sipalodifadabuvazile.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/skeleton_creek_book_1_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/48273435588.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA96 3076 bytes
SHA-256: 54ea8d415437cda84ac7550c479151837fe88da9f306c046803e40574b6305b1
font_01_sfnt_off0000d58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58A 5404 bytes
SHA-256: 001b13db1c2c188045a5cca4173dba649027a84513066ba076504bed3f1ca55b
font_02_sfnt_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 12240 bytes
SHA-256: c9ed6d3b7009f5e0c44eaf98bd46b221a0053464e5968400ad752d4ee4a89777
font_03_sfnt_off00010f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7A 16448 bytes
SHA-256: 6ec32ee6866cffe595faf2be5771fa47ce83f8fe0f3f39aaa736087e15d52b4e

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