Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30ab22c7bf08cc1…

MALICIOUS

PDF

92.5 KB Created: 2020-12-06 19:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6ed2efcda959f5aa7c32f4ba66ba8857 SHA-1: d41d713f7e2b767b7d06557cbd74876c0054a46b SHA-256: a30ab22c7bf08cc1055780e8be63cf6623aca8d6c3a340d396764eda6101c5b8
214 Risk Score

Malware Insights

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

The sample is a PDF document that contains multiple embedded URLs, including one identified as a malicious redirector. Heuristics indicate it is part of a link farm, likely for SEO manipulation or to direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary attack pattern involving redirecting users to external, potentially harmful, websites.

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://ggtraff.ru/123?utm_term=reset+tomtom+gps+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382962/normal_5f8d572f240c9.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/japif_tiwojex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5fa9ebc8692a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f8ca0b4051c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5fc8b2bdba623.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/devuxuzejozam/anticonformisme_definition_simple.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/54314546628.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/az_civics_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/papalojikajino.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/ariel_coloring_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/bts_fire_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/xajobixusogis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143eb5db-3512-4774-9653-08296233d12c/40825399711.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_off00012d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3F 5052 bytes
SHA-256: 328a688a6755918b1ccd9253fa9f44624b38cd37b5a4311bb5d87a90352faee1
font_01_sfnt_off00013e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E63 11804 bytes
SHA-256: b2ce19f5a62c48ce2446101b44fa9c27c1b0e2706fec53c6c218cadcffa1a2a2

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