Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfbb37cfb090f8a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 21:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 40c7a4d1c076514ff515722a331e3277 SHA-1: 9e6fbfd13cc1892bc67ed7746023ae4d83514ef9 SHA-256: 2bfbb37cfb090f8ab646cc173543afb1540eb223a0595fe3217dac2fb738fc6f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution campaign. It contains numerous embedded URLs pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to a 'Bostitch btfp02012 manual pdf', which is a common tactic for phishing or malware delivery.

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://xezojetit.ru/strik?utm_term=bostitch+btfp02012+manual+pdf PDF link annotation
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/4110305.pdfIn PDF document text
    • http://supozupewurak.22web.org/arelle_gaming_apk.pdfIn PDF document text
    • http://scrlt.xyz/29320378338mitkc.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/ece6132a2aec.pdfIn PDF document text
    • http://agreevudb.rest/stewart_precalculusdfnmv.pdfIn PDF document text
    • http://mibenovapus.22web.org/85944957630.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/8125778.pdfIn PDF document text
    • http://kadazid.22web.org/tipij.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/tufikelonome-jubafu.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/14978656646ovkut.pdfIn PDF document text
    • http://mofopafilubo.22web.org/nerirewe.pdfIn PDF document text
    • http://theplafond.xyz/89013967611nurv0.pdfIn PDF document text
    • http://copyrightshelpcenter.com/jack_and_the_beanstalk_full_story_youtubegl8lv.pdfIn PDF document text
    • http://yblda.fun/types_of_mood_in_mental_status_examfnl9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/629a942c-3238-480b-8802-fc2b48d9a0d7/mr._coffee_coffee_maker_5_cup_jwx3.pdfIn PDF document text
    • http://wubavon.epizy.com/wofogunanurivupad.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/1015680063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9986e9a7-6abd-4645-99bf-7107a4d7f05d/87425384828.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/vilozopekopetafudani.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/printable_blank_weekly_calendar_template.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_off0000f4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 5812 bytes
SHA-256: f41b3fbdb8f199988b6c888abe70af9e82e42f8d1908acd4c011e28b4686167b
font_01_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 11792 bytes
SHA-256: 8325326909d215d1c90abce8761f2b8a90868500749a888b0a2ab4de72b71e79

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