Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e95529f2fe2f0b…

MALICIOUS

PDF

96.2 KB Created: 2021-03-14 13:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b1f73d6c46ff76d2334db731de837737 SHA-1: e076295a5b893a352630c3e3af5ac6388e62c4af SHA-256: 85e95529f2fe2f0beac0bc7fb62e9c225914cace2102ec0a6fd6e5cab226554d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=is+there+a+sequel+to+the+night+manager PDF link annotation
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/nanasujizij.pdfIn PDF document text
    • https://cdn.sqhk.co/kukusagufo/jGojdjc/jitewoziraterexek.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/w8Zjjic/65277302037.pdfIn PDF document text
    • https://cdn.sqhk.co/buganisazobu/3vhekFs/slot_car_track_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_5fea10d1a7d5a.pdfIn PDF document text
    • https://motovatexasej.weebly.com/uploads/1/3/4/9/134900011/3029096.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/hhhdzid/okay_madam_2020_cast.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/gojebetefiwaki-fibini-gukatiwapu-noxikelubabeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_6031366bd4347.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/1ToifHa/9947756138.pdfIn PDF document text
    • https://mosagalalevo.weebly.com/uploads/1/3/4/6/134668437/romevire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_602570d6de265.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/hiidjdX/best_virtual_reality_roller_coaster_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/xojoweva/7jhSThh/call_of_duty_black_ops_pc.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/4877510.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/hjjifja/jolaxigiwijuzedelagudef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_602bf79ccf526.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bcbsnc_botox_prior_authorization_form.pdfIn PDF document text
    • http://misosemarimo.rf.gd/61262072646.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/trigonometry_formula_class_11_in_hindi.pdfIn PDF document text
    • http://fefomuk.epizy.com/zolesupajibotukozilux.pdfIn PDF document text
    • http://podaviloridi.rf.gd/61150670791.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/furas.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_off00013888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13888 5164 bytes
SHA-256: 1d296c41e237f9e9e6c840bf5a259ce1fda125807d9077fb53041b4d682c2c25
font_01_sfnt_off000149e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E9 12436 bytes
SHA-256: becffcb2ef6ef833e5883c94fe9bdd299c23e76d256530784b48af6ab71891e6

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