Malicious PDF — malware analysis report

Static analysis result for SHA-256 be854d79ff140da8…

MALICIOUS

PDF

81.3 KB Created: 2021-09-22 23:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a12ee787a7d43e4d7090a2ed9ed20d29 SHA-1: b6a8d4c3a90df46447764eb96f48cafaf81dba80 SHA-256: be854d79ff140da857a4827cf315d6d4a7c56d3270facc2306a9f0da90f9e870
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is structured as a link farm, suggesting an attempt to direct users to malicious websites. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext, likely involving a callback to a fraudulent service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://queure.ru/uplcv?utm_term=the+sims+mobile+cheats+money PDF link annotation
    • https://sthouseluxury.com/upload/files/bifimip.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/xipasofop.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/71252917262.pdfIn PDF document text
    • https://motecx.com/images/file/tezusasazuwi.pdfIn PDF document text
    • http://vipdiler.ru/files/file/gusemer.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/xoguluraregegekerajunabo.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/gamudomudawugexuxisebe.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/bebimod.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/xaputogonusuri.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/66133337534.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/18182334291.pdfIn PDF document text
    • https://opremazabebe.me/userfiles/file/sebusogajibomujibo.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146716ddef8e---8907422112.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/12220261979.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/74603104424.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/10877075788.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/45639147973.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/16878304512.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/31198778775.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210903125518.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/dopudijobalereruf.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0d6825000f0c44c4de2155c1a4c3f731/mivepawivomutozu.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://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_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 16884 bytes
SHA-256: 900b1ab383e396e1630e12b67dd683e581f998bdbe2227e6239566c3bd22dd7c
font_01_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 10612 bytes
SHA-256: 37cf9017d075a9984b9406d13c63f6d24bab7de8b5be2c500afb440e87c10fa0

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