Malicious PDF — malware analysis report

Static analysis result for SHA-256 9282deb0814e71dd…

MALICIOUS

PDF

88.3 KB Created: 2021-03-28 08:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 575bc6537241d8c576143abae02da645 SHA-1: 7d77894005b11db632d384302a14eb86c2cd9a21 SHA-256: 9282deb0814e71dde4d27b44087e11014eaa389ddfefae8d4fad1c422f256f1a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL leading to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to an 'inventory checklist', which is a common tactic for phishing or social engineering attacks. No scripts were extracted, but the presence of multiple external links points towards an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=step+10+inventory+checklist PDF link annotation
    • https://bogixeguwumuzu.weebly.com/uploads/1/3/4/5/134503630/988fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/c3yWZVS/91379565374.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/bjggjhb/kamevodefu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5fcbdf515042b.pdfIn PDF document text
    • http://gaxesujite.medianewsonline.com/kukunaragop.pdfIn PDF document text
    • https://xizirujikalowev.weebly.com/uploads/1/3/1/4/131454807/cd0cf0faf.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/jgcoxic/rufasomesub.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/calendar_2020_uganda.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/gasedijurul_pizexoluda_vowimidoduvima.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/voTK8gh/vakitidofebufozarija.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/tuvuve.pdfIn PDF document text
    • http://yewes.space/lg_v20_batteryedb4d.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/e533a.pdfIn PDF document text
    • http://chistohome.moscow/seviveporuraja78x7w.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/mabimij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_6050f9d8b5d0e.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/kujapomib/rizojowula.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/singapore_math_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/50194684512.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/bonuveduxemavi.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/how_do_you_use_a_stanley_fatmax_450_amp.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 5332 bytes
SHA-256: 3403c947fad6eaa1e2645733ad2b2996ab6ec2ef7de61eb057a64d9edfc1b9c4
font_01_sfnt_off00011795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11795 11104 bytes
SHA-256: 628cfa96e50a9093c217a310045329176a59a265afc0e1c2f82b8456850cb856
font_02_sfnt_off00013d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7D 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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