Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab4f05eca91b24d…

MALICIOUS

PDF

69.6 KB Created: 2021-09-30 16:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aed47c562dd804aba0d5c2ea336474dc SHA-1: e1bd8ab6a5aa48665bee7e9a68e65133d139c7b4 SHA-256: 6ab4f05eca91b24d08a3143af927b08eeae07da8811f82007409d3ab84e500e7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, a common tactic in callback phishing and tech support scams. While no scripts were explicitly extracted, the presence of numerous URLs and the heuristic firings strongly suggest malicious intent, likely to trick users into divulging sensitive information or making fraudulent payments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=watch+one+piece+stampede+online+for+free PDF link annotation
    • http://sibaco.ru/ckfinder/userfiles/files/widoximevem.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/22234016716.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/71970822208.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/60837180051.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/97090223475.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/1200dadf822fb3bd0c355692abc466d4/bamikuxeluvakegizojujeb.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/61279248709.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151daf077725---lesereniwome.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/kilexarugo.pdfIn PDF document text
    • https://hotelcorona.ro/files/vofofedobarorugoro.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/purubetakabudoj.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/13518252273.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/140892763.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/14277482448.pdfIn PDF document text
    • https://majubesar.org/contents/files/26915559662.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/zexunelizafudavukis.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/xapupusaxakaxowi.pdfIn PDF document text
    • http://primaneighbors.com/userimages/56374737825.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/86068505367.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16144bdaa4dcce---mikowafetapube.pdfIn PDF document text
    • https://rodotour.com/userfiles/file/3921210190.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130551107d54---2517278247.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_off0000b09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09C 14804 bytes
SHA-256: 41e60eecdc3edf997ab3e5e3609d1976cfe6227a92e97b474aed6eb4fef0d80b
font_01_sfnt_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 10880 bytes
SHA-256: 1f4a50587dc2de45cb7dd842dbbebfb91d218071f3970fd89c187d1a58471d96

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