Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46d1ef353046141…

MALICIOUS

PDF

74.7 KB Created: 2020-12-02 11:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d3b3918e5a76abfcce0b718c04e40df0 SHA-1: 299b94e85c5308953cf60c93589ae0cfccfca9ae SHA-256: c46d1ef3530461410c18ca867ce59a5efb52ccf7349b2e5c7e40a75ed78e8b29
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=sims+4+apocalypse+challenge+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f8d6eccc85ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_5fb78bba27e07.pdfIn PDF document text
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/5318663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5f9acd8300e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478398/normal_5fbb255c95023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fb57f1421389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5fbde01f71db7.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/68a97d41-b8ae-4cc5-bf4f-2896b8729c63/vegifed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ff9227a199023ab5e001/t/5fc6313cbc819f1cf4ab3500/1606824252351/back_wars_mod_apk_unlocked_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caba31a7-bc12-4023-a447-dabcb9f0fad7/minecraft_split_screen_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781ecf29-8981-4048-a14e-bfffd2287a42/88766787621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc4cd1b-6399-4ec5-aeb1-4c32b20f0b05/glen_park_merchants_association.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0ce282-2082-4c9b-92ef-fe90eccd5ecd/10778751846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec8349e-f5e0-4329-a9f3-c5a35f531315/tesibarelapezazavofatib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228c69cb-b58d-4821-a9c0-236af0644eb1/76274966015.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51bf8c6d96458363d4b13/t/5fc73bac1d106d256bbf287e/1606892464398/residence_time_of_water_in_atmosphere.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_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 5684 bytes
SHA-256: fae1950b31af31549bf7af1e40bf5ed4f6b2763c76e1cee138ca7fd7e2127c9f
font_01_sfnt_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 10752 bytes
SHA-256: 0028e9809a216fa2639a4b6b227dd00752913fa55fcd397d8de41413ae3d9b35

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