Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e8ce477d76d438…

MALICIOUS

PDF

69.8 KB Created: 2021-03-20 07:32:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4c56d9679c90bd877b9b87888fcbaa02 SHA-1: 960681231201eb91ed7e0abc93e678e22bca4bce SHA-256: c7e8ce477d76d438a54a1d4747b502b7e3e3b4ba8cd9c36257940c2faaf247e3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to 'bologen.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded content, though heavily obfuscated, suggests a lure related to a Dyson vacuum cleaner, aiming to trick users into visiting the malicious domain.

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://bologen.ru/strik?utm_term=how+to+use+the+dyson+small+ball+vacuum PDF link annotation
    • https://cdn.sqhk.co/jotenitix/ice32v7/punebugefi.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/sdP3giE/nutobojitivirisolegip.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/iejbiib/lijan.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/PHk6ijg/kazabape.pdfIn PDF document text
    • https://cdn.sqhk.co/zaborofisi/jjigWha/fitedusifanisowelanu.pdfIn PDF document text
    • https://mekupefaju.weebly.com/uploads/1/3/5/3/135316310/ponog.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/RVxXHij/pinterest_video_downloader_app_apk.pdfIn PDF document text
    • https://jabukosiw.weebly.com/uploads/1/3/0/8/130874379/wojuzeladaruwig-pomunoza-golen.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/Wphdpgi/being_a_werewolf_and_vampire_in_skyrim.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/6qCAhfL/aladdin_2019_box_office_predictions.pdfIn PDF document text
    • http://jalogeteka.iblogger.org/futura_bold_font_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rapurakoke/ifmggbe/37225495170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamalupit.rf.gd/lovedrobe_dress_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6d0a91-5ba7-4cfa-a350-3ed90bb0aced/ragufavezuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca697975-ba9c-418f-a522-9965b04dc1bf/continental_girbau_washer_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276c1bf7-5195-4fb0-a1e2-3d26894d5b1f/fajatapizimadekosar.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/ecological_pyramid_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eae1aea-3b7f-4080-91e9-954eb166395a/5542296213.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_off0000d1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FC 5436 bytes
SHA-256: 01e79d0c0d764c0bdbaae59a44b15ad661e6c30a6377a059f49b83ffa155b20d
font_01_sfnt_off0000e46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46B 11088 bytes
SHA-256: d108c2f4d093886b9ae384692a96bbca78adb5d5ca76e45bd023a03f923ddfbe

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