Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf68461124c50ff…

MALICIOUS

PDF

73.1 KB Created: 2021-03-22 23:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 88d81bbfd9c66050bd9725424119cd25 SHA-1: f1208a961add395128ec39e7bd3fc1f1c37e12de SHA-256: fcf68461124c50ffd194de17aa793dc1dc3146f1c5e04703b3f9fe6f8d93d17f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, identified as a link farm. The primary purpose appears to be directing users to potentially malicious websites, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the structure suggests it's designed to lure users into clicking links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=xfinity+modem+cgm4140com+manual PDF link annotation
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/pumomunovojasi.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/fcqqX0q/the_gardens_between_missable_achievements.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/Cichijd/riximepasowiwut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fcd6178d4d28.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/jaifAHS/royal_caribbean_international.pdfIn PDF document text
    • http://latatal.iblogger.org/simple_medical_fitness_certificate_format.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/iihbn89/mi_launcher_pro_apk_cracked_download.pdfIn PDF document text
    • https://fuxusololozo.weebly.com/uploads/1/3/1/3/131380606/a8a901cc.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/ghIkjbf/imf_grant_facebook_messenger.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406777/normal_5ff55f4f34ba1.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/xaridofa_fibatamugaxugav_xisidinavajog.pdfIn PDF document text
    • https://kadexatazi.weebly.com/uploads/1/3/4/6/134648676/01eb94cf9a394.pdfIn PDF document text
    • http://itclick.info/23126927124trec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_603c1832d0fd1.pdfIn PDF document text
    • https://kivisazof.weebly.com/uploads/1/3/2/6/132696558/1006548.pdfIn PDF document text
    • http://tryporte.xyz/2000_7.3_powerstroke_engine_diagramnqzse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gerinidud.epizy.com/65473408788.pdfIn PDF document text
    • http://nezezijafarirer.epizy.com/51355519730.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/digarinobaje.pdfIn PDF document text
    • http://kadegezopofog.rf.gd/textbook_of_biochemistry_for_medical_students_6th_edition.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/cgn_global_business_transformation_consulting.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_off0000de40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 5428 bytes
SHA-256: b8c5c76a183fdcbd9d9576f99d82d556859c976fcceb3b7ccc282900fd5eb967
font_01_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 10796 bytes
SHA-256: 38430db8edf36e6e88cafb1f6a165ac7565a150b0bd603fafa607f80edb9f34c

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