Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f44a8fa42f0634…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 23:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: febc213ef7d0150eeb86762e8cb6c31c SHA-1: 2c73ee38853c4e1c7aa3aeabf5fc1606f820d621 SHA-256: c6f44a8fa42f063401481263fbb02c0b4c0df7533e6b1752395c6aaf099c6eca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress sites and disposable hosting, likely serving as a link farm to distribute further payloads or conduct phishing. The document body is heavily obfuscated, preventing analysis of its specific content, but the heuristics strongly suggest a malicious intent to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://garglob.ru/uplcv?utm_term=ps+touch+cc+2021+apk+download
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6k4m6divg03hpb68qsvicclabp/95124492705.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/crn2c88hskn3su7jmr6lu5atrd/zedigupopapogirazaf.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/5cbbc193180f96b301540cd6c012225f/romemomokanekivedogupo.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/9gkolhs9o019b9jah3euppvlvq/fujuxabulonumizizofosikov.pdf
    • https://copperscraphandlers.com/ckfinder/userfiles/files/66449751814.pdf
    • http://tortsurprise.ru/upload/redactor/files/favetadov.pdf
    • https://jnvhardoi.org/ckfinder/userfiles/files/xivuritoz.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/643b0e934edde7da83d08b23ec1087d9/lifumoguwiwelof.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796c06eab67---7367349327.pdf
    • http://andlupa.com/userfiles/file/13103970330.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8f4592b9---10901409979.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ae45a0f3e8d3f3acc7a4e2eb94e95036/60843596698.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a197ca2fd42---kumevozedotigetifa.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/67a5142080fd1f2c2e7d8af6551dadf6/liwokon.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b615111aada---95896629746.pdf
    • http://nacyc.jp/Upload/file/43194109942.pdf
    • https://brahmagnanam.org/fck_uploads/file/ralovuwigezatusaze.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1251dc537---5549662494.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/um9m89ad6rtq5pv1n3113mft8n/92589018618.pdf
    • http://xlsferrosilicon.com/d/files/78778027537.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/3pu45v2hnphns6emk7vma81jqp/66220613557.pdf
    • https://netshopnepal.com/userfiles/file/68772344885.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9bqab8h156filps5p2vjc9tk32/naxipolomaf.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7c28cdd32a325ddc40861c6cf673b3e3/89695454906.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 16792 bytes
font_01_sfnt_off000100ee.bin
41172a849f2db91fad00556dea7fd8142f77e4c727c715621755c6bfef01ed80
pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 16712 bytes
font_02_sfnt_off00012c72.bin
67bbc28b7bef50fd8e770641fdf40b1867af4ecc4b01de554f6bfa286d8bbd9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C72 10860 bytes