Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8430478aaf4926…

MALICIOUS

PDF

70.5 KB Created: 2021-09-13 14:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7900485389eadad1b739e57f465b5b7 SHA-1: ce0edd07b0847d10df835cac654a4273657276cd SHA-256: 8c8430478aaf4926f537a7162ea284a2ffe8733441324c0ec7d86d5608139377
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The presence of a heuristic indicating a callback phishing lure further supports this, as the document likely aims to trick the user into interacting with malicious content or providing sensitive information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=full+battery+alarm+apk PDF link annotation
    • http://157.230.241.115/image/upload/File/tiluboninosefof.pdfPDF link annotation
    • http://www.almansori-ye.com/almansorifiles/files/31524731081.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319236615be---36843006134.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/65627485382.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/51672082799.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/bepiroronawijapemipe.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e7821b4f6e09942443d62e7cb2e4e26a/damizititafurejodozenikot.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/suxigokam.pdfIn PDF document text
    • http://zaiger.ru/img/file/zadiritosu.pdfIn PDF document text
    • http://coolscape.info/images/files/togimimapusigeveri.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/37960481987.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/jerakumesi.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ecc16105f17e7557a8bfe7c8a78d31c1/panipeloxeza.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161376eadc5e77---89037562474.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210904_344A2CCCBF29F25A.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/xerexi.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/75459010172.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109122103571482.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f923711142---ketukevawanojilagupezege.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/69634720562.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/66883559008.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/51812801852.pdfIn PDF document text
    • http://arucax.am/user_images/file/vuloxowusanupezito.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB359 16056 bytes
SHA-256: 3ddf0f8f9e44232559150dac4b443bfcc7dfac502202d03c99c747075b46e9dc
font_01_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF532 10352 bytes
SHA-256: 4f1c7ddd36477075d39744a5f9a7bdc534c6ae7b29daccadfbbbfa34ffbf371e

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