Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97c1e95330aee1b…

MALICIOUS

PDF

104.5 KB Created: 2021-03-29 06:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8f63b9c2396479f1d062eba2c7efd3 SHA-1: 994f3375c235824630c80d93960a3149c8a4f0c7 SHA-256: d97c1e95330aee1b6263674de59b490bb9dc74b3f2944c50911191e33c0a25c7
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly and other file-hosting services, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs and the PDF's structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=boss+dm-2w+waza+craft+delay+pedal+review
    • https://dizugupixaxagoj.weebly.com/uploads/1/3/4/4/134440249/1599104b37af.pdf
    • https://vafarisitoguv.weebly.com/uploads/1/3/0/8/130874489/54c35.pdf
    • https://cdn-cms.f-static.net/uploads/4500889/normal_6018d401d2c92.pdf
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/xodawopel-wakonuwomek-falekubeve-pijokomarowat.pdf
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fd17b6e89d01.pdf
    • https://cdn-cms.f-static.net/uploads/4452389/normal_5fd63eb9da92d.pdf
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/sowezulekuvurula.pdf
    • https://jamobosis.weebly.com/uploads/1/3/4/6/134684796/bovujon.pdf
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/7022102.pdf
    • http://italywom.space/what_are_the_major_layer_4_protocolsce2yg.pdf
    • https://pudodogefelareb.weebly.com/uploads/1/3/1/6/131606347/welikavuj.pdf
    • https://cdn-cms.f-static.net/uploads/4456685/normal_602e36769903a.pdf
    • http://helplnstagram-confirm.com/muvigilatejitiminetefegor9b9y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/8d37cbc9-9843-4e40-9d07-120ffcdebc69/super_word_search_puzzles_music_of_the_christmas_season.pdf
    • https://uploads.strikinglycdn.com/files/b6915b76-8213-47ba-afbc-381a3f8963fb/37815101853.pdf
    • https://uploads.strikinglycdn.com/files/9c6dd1f4-dbc9-4841-9a53-44b434e3882c/zoom_g5n_instructions.pdf
    • https://uploads.strikinglycdn.com/files/6f3dc088-5831-411d-8d72-d356c14d4114/gafipajemozofanokarala.pdf
    • https://uploads.strikinglycdn.com/files/68afead6-4396-465e-ba10-f8215f4ead86/defigatapufupajamotaj.pdf
    • https://uploads.strikinglycdn.com/files/b1dc1353-836f-43c9-89b9-36fe9044b6ff/71763879686.pdf
    • https://uploads.strikinglycdn.com/files/611766bf-559c-406e-a826-873de078def5/peter_and_wendy_2015_watch_online.pdf
    • https://uploads.strikinglycdn.com/files/87c6097c-a95f-4bf6-8309-900e81e66844/9013816021.pdf
    • https://uploads.strikinglycdn.com/files/5b2ea9e1-21f8-4ac5-859f-2c624e312844/20201227880.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_off00014e29.bin
dc0122ffad27ee33f142a6baeab97fad8d4dcf9d9621f38aaafa11331488e0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E29 5500 bytes
font_01_sfnt_off0001610b.bin
49d28a84ee75bba177c1d374cfff71e449a4fdb7b70d7a6d16b3c20094b642cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1610B 10392 bytes
font_02_sfnt_off000184bc.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x184BC 4324 bytes

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