Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafcc250da9771d8…

MALICIOUS

PDF

78.8 KB Created: 2021-05-20 21:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ec4619b62b754aca45661a1824e298e SHA-1: 291997bfc053c6123d15359d1ea5c7eeb9c40a5e SHA-256: dafcc250da9771d893c8b1960d78139c3c7a84e43bcd83ce198b10ba1896f628
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, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://ponafet.ru/strik?utm_term=how+to+get+an+affidavit+in+lieu+of+title', suggesting a lure related to legal or administrative documents. The presence of numerous links, including one to 'https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/4d01502f2221.pdf', indicates a potential attempt to direct users to malicious or SEO-manipulated content. The ML classifier and ClamAV detection strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=how+to+get+an+affidavit+in+lieu+of+title
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/4d01502f2221.pdf
    • https://cdn-cms.f-static.net/uploads/4383467/normal_605dca009f350.pdf
    • https://cdn-cms.f-static.net/uploads/4468261/normal_5fe9e9cd7f28d.pdf
    • https://cdn-cms.f-static.net/uploads/4404733/normal_5fdc4d0ae0380.pdf
    • https://kukuwifusebuve.weebly.com/uploads/1/3/1/4/131438412/5c9d2d00.pdf
    • https://xuxijoma.weebly.com/uploads/1/3/3/9/133997678/zuxefuwiteza_bugize.pdf
    • https://jevulifed.weebly.com/uploads/1/3/4/4/134457796/pirudoxuf-nosiker-xaxezimibijero-rotijipi.pdf
    • https://cdn-cms.f-static.net/uploads/4489977/normal_604d3a899fc2e.pdf
    • https://libizegenumejav.weebly.com/uploads/1/3/0/7/130775388/naxoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fivebo/notation_guided_notes.pdf
    • https://s3.amazonaws.com/rujimidujek/sagalovifegezonaxolazi.pdf
    • https://s3.amazonaws.com/wujapu/52689389969.pdf
    • https://s3.amazonaws.com/sudevejerifu/3971750564.pdf
    • https://s3.amazonaws.com/dudurat/18921854566.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/75755641743.pdf
    • https://s3.amazonaws.com/gavapozalilup/my_husqvarna_leaf_blower_wont_stay_running.pdf
    • https://s3.amazonaws.com/wesezuzuvalirik/bacaan_sholat_dan_artinya_sesuai_sunnah.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_off0000e926.bin
37d42b95cf5663e58adfa29e1e409a018f042b52b4049aadc72d369ce800a6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 4796 bytes
font_01_sfnt_off0000f99d.bin
3318d2ed780465e3409f90cb1ec02e46792a93f66e289b0749895ebf135091fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 11356 bytes
font_02_sfnt_off00012024.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12024 4324 bytes

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