Malicious PDF — malware analysis report

Static analysis result for SHA-256 0914983465cda28e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 17:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b19c71462cac8161a5ef764c0ce0ec04 SHA-1: 9fd3876f0e16084cae17ba3ebede71d2cf3c0d10 SHA-256: 0914983465cda28e675bbe22fe6f9175156c7fcfafb276510141b26409121b9c
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to 'men's style manual pdf' and the wkhtmltopdf tool, indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://botokaw.ru/wix?keyword=details+men%2527s+style+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/fajaleniwa/DhiDRH9/freaky_snapchat_stickers_for_guys.pdfIn PDF document text
    • https://gupakejaxigi.weebly.com/uploads/1/3/4/5/134581176/4229488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_6014b397b1d88.pdfIn PDF document text
    • https://sowofofum.weebly.com/uploads/1/3/2/8/132814146/7604252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_602dc651b94cd.pdfIn PDF document text
    • https://nawobelif.weebly.com/uploads/1/3/5/3/135307193/df90af2f610e6.pdfIn PDF document text
    • https://cdn.sqhk.co/salipini/gcUiaCP/13299350439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_603c0db3507f5.pdfIn PDF document text
    • https://dazarurizupe.weebly.com/uploads/1/3/1/1/131164120/vipunejodataju-nimakadebereza-tudezulekudopuw-satepajane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_603db3fab287e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459621/normal_5fdfb9278d8e2.pdfIn PDF document text
    • https://modevibivuruwix.weebly.com/uploads/1/3/1/4/131406629/fea9ae.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/bjaiegj/41174728390.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/hVWINif/rareform_cora_tote_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_6047522f0c99e.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/hbhagjI/jotuxebifazuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_6020b5e2b433c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supetarezof.epizy.com/37399606600.pdfIn PDF document text
    • http://tujukiji.rf.gd/75857017676.pdfIn PDF document text
    • http://buketoxepebaf.epizy.com/microsoft_outlook_calendar_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/46507790874.pdfIn PDF document text
    • http://ruzevatiwabakiz.epizy.com/51209080733.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/30138530660.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/baking_sheet_meaning_in_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/gebejumiwanovatexipara.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/50441902756.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_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 5224 bytes
SHA-256: 7fa17cce30aa0c403f208a0255e046697174aaac44755684425d700ad56f4a51
font_01_sfnt_off0000ffef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEF 11264 bytes
SHA-256: 4639da6f73325730a76d8c3fc7c941fdd1cf830e37897e73cdf488bf509bcdde