Malicious PDF — malware analysis report

Static analysis result for SHA-256 146ab58d4d241081…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 03:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec328bb68c6707b2c72c5ab3575331c6 SHA-1: 724de2e905c991f5e1d905ba9ad42b8cef447594 SHA-256: 146ab58d4d241081b3a498252d8cf4fb3663f70cca8efed9c582469cfe41ba1a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to direct users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=discipleship+essentials+website
    • https://cdn-cms.f-static.net/uploads/4450641/normal_604f761a1ac1e.pdf
    • http://bivoliku.mywebcommunity.org/test_poziomujcy_angielski_b1.pdf
    • https://static.s123-cdn-static.com/uploads/4495037/normal_5fde3f5514953.pdf
    • http://zavolofa.mygamesonline.org/8771905024.pdf
    • http://pazujiz.mygamesonline.org/32255599288.pdf
    • https://static.s123-cdn-static.com/uploads/4402504/normal_6003e09fd2f04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/115d40b4-f8a4-4d86-b477-714da4340ecc/75682869845.pdf
    • https://uploads.strikinglycdn.com/files/6fe20e7c-fc93-47b4-833e-e6db4a3d57a8/what_constellations_can_i_see_tonight_uk.pdf
    • https://uploads.strikinglycdn.com/files/101b8cdc-4ae8-41af-9921-cd5680f10bd6/is_shop_vac_a_good_brand.pdf
    • https://s3.amazonaws.com/jivamubug/yeezy_supply_shoe_size_guide.pdf
    • https://s3.amazonaws.com/jutenojamega/11002402929.pdf
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_2e4bd2fb62304e0e86c965ae511f562b.pdf?index=true
    • https://s3.amazonaws.com/babetafaperaxov/metabolismo_de_aminoacidos.pdf
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_774127b020ba494eaf7233bb2e263341.pdf?index=true
    • http://ruzakema.onlinewebshop.net/medical_science_liaison_resume.pdf
    • https://uploads.strikinglycdn.com/files/9aec3eef-1299-4bd9-a6d3-8d8c94234303/27623806620.pdf
    • https://uploads.strikinglycdn.com/files/ab61677b-e1f4-415d-94b3-ec0144e6e624/xejuvizigodukunidef.pdf
    • https://uploads.strikinglycdn.com/files/af485f4d-4653-46b1-94c5-3b4c1587f7c8/72395436804.pdf
    • https://uploads.strikinglycdn.com/files/5c5042be-2615-464e-a38b-521f849e2851/how_to_adjust_braun_thermometer.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_f2224d45d3304246a8b58f2be5e79006.pdf?index=true
    • https://s3.amazonaws.com/rerinago/fijusunudev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ec.bin
f6dee4d089377dbe74e888fd03b51b4193bc53fdef11cea47de7323ddd16a348		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 4832 bytes
font_01_sfnt_off0000f957.bin
e3f234f4d9e188deb5e1a4b627d23e8656fe06efc752e201f3da74cad8b2e9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 10392 bytes
font_02_sfnt_off00011c9e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.