Malicious PDF — malware analysis report

Static analysis result for SHA-256 7794755554eb3210…

MALICIOUS

PDF

81.5 KB Created: 2020-12-22 19:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0670fdb0f51d3b7c9e0772e2e3f8c30d SHA-1: 7b7d133a8e8b59786813767b9e32b85edeb2d3d0 SHA-256: 7794755554eb3210229d535e9b89460f8c5cba2f6925a8925da8fcff1281a07b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffking.ru/strik?utm_term=drop+balls+game'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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/strik?utm_term=drop+balls+game In PDF document text
    • https://mufuxavezefajox.weebly.com/uploads/1/3/4/4/134497947/2483734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5f9183469d31f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_5fd1bb9814d27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5fbd2a86e0350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453900/normal_5fd891b3ab2e6.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/9380797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5fa44ce5619a1.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.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/dudurat/54812170124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2de8b62-86a4-4423-8aae-501de3acb24c/xamofajadibugepowugarerel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eebbc26-12e8-49d7-8781-c79f556b15ab/nopimuvarowonakebul.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_off0000c9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 11024 bytes
SHA-256: a8beeebc97262fad5f53d0204cb05c6209fc0322ddb1928060acd38bbe8073f5
font_01_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 5280 bytes
SHA-256: d42152ad0a0c8b5992afdd52564798be9cb76f25aed628d2908f66d5ec80c7ff
font_02_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 10188 bytes
SHA-256: 89e9ffc5bf6a50029b26ba78b928cd25a0ca2395f3e04c6fd93fcad8b93df09b
font_03_sfnt_off000122d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D0 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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