Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a703fbd220ee29…

MALICIOUS

PDF

76.3 KB Created: 2021-04-01 05:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 477518f1515f8c0d2681bc33b655ac52 SHA-1: 20336689bf94ffc8a038c697e0fa41e0ae5afff9 SHA-256: 27a703fbd220ee29e76ea2b357e000386e52600fdcfb05a4aecfd5227eb734f9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=fluke+1507+vs+1587 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473903/normal_5ff400ad2cbbf.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuravaxoxi/ahdfgd0/17675101125.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/jCnhijc/gorag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_600e48598ff98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5fffce2f2992a.pdfIn PDF document text
    • https://cdn.sqhk.co/kirorakoxu/aieierj/hide_and_seek_map_fortnite_small.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_60201408e62ae.pdfIn PDF document text
    • http://gagapazu.scienceontheweb.net/63179868702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://patikogoxuxit.epizy.com/allegro_pcb_editor_user_guide.pdfIn PDF document text
    • http://gegavolaful.epizy.com/75045308638.pdfIn PDF document text
    • http://jegujijixunef.rf.gd/79083762432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82f19e8-3b1b-43cd-a3f9-0cff8773daa2/is_rainbow_six_quarantine_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb0af9f-b1bb-41c2-b73f-d052ad8c4d15/rinolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c67c7f-e40a-4c0e-9d0b-1ac9ea92965b/fevudizusikijoli.pdfIn PDF document text
    • http://bodagoge.epizy.com/dadedagozip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2847c5d-f01d-419e-a012-6ea5d01a6b2e/buvosewojubakanilajabub.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/50542557709.pdfIn PDF document text
    • http://gogobat.epizy.com/44452065021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38a9bbd-a28a-42aa-bde4-e3a3861563db/zujup.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_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 5044 bytes
SHA-256: 26b48fe227f8d41a430b79eb738c8900e33cbbf6d3611e2b0223bab1f33f02e1
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 11356 bytes
SHA-256: 5ae7077914ade67f16f99020c99f5a6b154a3c7efa9df57e4f38a37ee2ffacb7

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