Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aa9e090b2f2e3c…

MALICIOUS

PDF

80.4 KB Created: 2020-12-02 15:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5909694150aca0cb6a62d1d163f5d58a SHA-1: 916c322e376636cf37ee0f731a0bc5a110ff6149 SHA-256: 29aa9e090b2f2e3c62328b3f2d78c8ed3bf8c52d500155e6f737f7e933ac5006
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 0.9997

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://gettraff.ru/123?utm_term=elna+sewing+machine+manual+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f872859471da.pdfIn PDF document text
    • https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/kiwefa-zipadi-wabejisex-xagow.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/621490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_5fa733df35c9f.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/4efc0a4.pdfIn PDF document text
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/norivomikisumere.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/4893388dac3d.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/2b758186-9b45-41b4-9a44-3fe9c581a7ac/fexewemora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7344a6e0-6199-4f2e-b164-45efcb500bac/63176271510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e905d6-8c07-4846-8652-02edaa8a86f9/godanazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f6f54f-462c-48a0-9daa-bb5f7b0e8b95/16x20_shed_designs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41165ca4-14f2-44a5-9f75-b7d42baae78b/74785104592.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_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 5284 bytes
SHA-256: 5a88cea403b4fa63eaccccb96947719ea52d376b5ecc48274b4e6d6a9569a555
font_01_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 10500 bytes
SHA-256: afbc57f0faaff5a24fcdb72116741d445ecf17f0f42e1d8b9f3f7fe5e0139cba
font_02_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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