Malicious PDF — malware analysis report

Static analysis result for SHA-256 44484d315b77c158…

MALICIOUS

PDF

69.9 KB Created: 2020-11-18 06:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41a7925a9226c7323236e3b4d9d4fb5b SHA-1: d3f3d02629c6ae16920ce5ff1167eecfd60d8ae0 SHA-256: 44484d315b77c158ba8b83b1a76da1954d743be098407d9b06403f09a3f2d426
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://gettraff.ru/123?utm_term=bible+verses+about+fathers+love In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f874288d7f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f9148f9876d4.pdfIn PDF document text
    • https://depufavekozumel.weebly.com/uploads/1/3/4/0/134017714/4112520.pdfIn PDF document text
    • https://luxotavazab.weebly.com/uploads/1/3/4/3/134349810/c9a3d593b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_5f8d46eac154d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422134/normal_5fb2521ceed65.pdfIn PDF document text
    • https://jewojumafolu.weebly.com/uploads/1/3/4/6/134651010/zuxojulosuxopelunup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/342e91d2-337b-4f27-999e-3016fc75ad9e/growing_up_white_in_the_1930s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e64c94-e371-4bc5-b4a7-a04d91937ea3/sesli_video_ekme_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff27a965-0a72-4301-9676-e93142368587/the_eternal_palace_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f71ba65-a942-440b-9443-b18b9d63874a/24662933982.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/bikewemulesabeximewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d0f0fa-62f7-410d-ae21-87a408884173/homes_for_rent_barrington_il.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/the_penitent_man_wiki.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 4880 bytes
SHA-256: 09b5222a4635e56541c4a42dfe9296af105e91da206445bee7b11614b2a3c052
font_01_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 10596 bytes
SHA-256: a091ae237321b179865183856ef061c3298420ef625008cced617c0544c150e3
font_02_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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