Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c123afcd591e026…

MALICIOUS

PDF

34.0 KB Created: 2020-11-05 05:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b47d2639fed1fe434a744383d402f5d4 SHA-1: 85013c45f36580f23746768bbcb7717e41d749b7 SHA-256: 4c123afcd591e026a36fa645a5246659ee91079ffaa1807ff91e09e8e6ac94d1
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that point to potentially malicious infrastructure, suggesting it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://gettraff.ru/strik?keyword=gargola+en+ingles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_5f9f3bb21c81d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5f9b5366b4e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_5f9df74039a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5f9acbcca5df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5fa26ee01cc62.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/3885849.pdfIn PDF document text
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/tizorujivopogoluguna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f8cfc6d1430d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8c49b6f2446.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/juvuraguvutoxif/34194257717.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/nasenobazuxuf.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/honeywell_s8600m_ignition_module_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/71876410862.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 4884 bytes
SHA-256: f8678b1b42fc26a45055e668f4190a7281f316f1769fe3271dcff39968d6213e
font_01_sfnt_off00005a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3C 9892 bytes
SHA-256: 90b526dda008aa0ffbb31424295f10531f99175eafcbec21cdbaad7e662818c7