Malicious PDF — malware analysis report

Static analysis result for SHA-256 f072ca9ee73643a6…

MALICIOUS

PDF

72.2 KB Created: 2020-12-10 20:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 098dc198d74027a8159d6e9587555d63 SHA-1: d26783688044e69a87dc1193081d043aa6cd3632 SHA-256: f072ca9ee73643a6597d972359e5db9d54767350197b7b90f15c53154e127047
156 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. 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=lord%2527s+supper+verses+kjv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469643/normal_5fbba554ef4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5fbce65a42b1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_5fc3fbd6561b8.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/6371534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f9176007897b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f8e5a69332e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5f9258bac874a.pdfIn PDF document text
    • https://nurerimufiwovu.weebly.com/uploads/1/3/4/3/134394752/nexef_tomukirumukusaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8920a9cd616.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/046a2a2b-1d35-47e0-943d-07594928f7f9/pafixajivotal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ffb303-d243-4edc-97c6-47ccfe56e686/pikijinoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5160d4d-26de-4e1a-8e93-c225e4b2e76d/bilt_techno_2.0_sena_bluetooth_evolution_modular_helmet_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df656e77-d82a-40e9-8fb5-743b7db71017/tiwovupokedofilenoful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7378c6d8-6b0d-410d-a6b2-7e79ffa8b680/hp_15-p030nr_disassembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a53a1e0-86c8-4e41-8b32-999ad296ca02/aumentativos_y_diminutivos_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cada259a-a978-420c-8ffe-f7ea8c18aedc/miwiwi.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_off0000e0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A8 4888 bytes
SHA-256: d2d3ae084cc1dd198eae7f51d3354d7b2b7e0a7437605d8fc0afd542776ff957
font_01_sfnt_off0000f171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 10180 bytes
SHA-256: 1e77b4e6348b2f3c3b7c7902c7ac3aa254bd5c1190c812b5cffa572b10c8ce3d

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