Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6ef96f92fd7131…

MALICIOUS

PDF

74.0 KB Created: 2020-11-25 08:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5fcf03a8fedd06da0622f8309e59fb30 SHA-1: de3ac05e08b05c739ebab6d4b90a8f5100964854 SHA-256: ab6ef96f92fd7131ccc7cf3641c7795abdfc871ef81f2e3ae804bd242e3b8f66
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=steins+gate+platinum+walkthrough In PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fb997cee2868.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/58f0f2b2.pdfIn PDF document text
    • https://likuxosudiva.weebly.com/uploads/1/3/4/6/134603152/busedopumeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5fa81e05935d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f970ee83f8b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_5f9578b42c0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f989d24db9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5fa0560a29fb3.pdfIn PDF document text
    • https://toviwapomini.weebly.com/uploads/1/3/4/7/134727984/muvopoguki-kepovonid-tukewe-xadodimubadilul.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/d9ffd75d65.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/wipotegadodorek/zarahemla_restoration_branch_independence_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/neruwobufutirufaweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfca6b6-b3fc-406f-941c-ee5235986368/mind_over_mood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662ea708-2eaf-4b54-8c1b-92af1b91eac9/tazova.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD99 6236 bytes
SHA-256: da304fa197daee6fbab393b366d9e1c2fed0d7ac40bb8519f20c1b571cb727a2
font_01_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 5492 bytes
SHA-256: 57544536b996c39762bcba6d3f996ae0cdf53ae60e22741ee07dbce7eca439c9
font_02_sfnt_off0000f58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58B 10920 bytes
SHA-256: fcddb0d274b86364f05f479315ae45e148d055b49483466bf124b8973ee96b0c

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