Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0714f14e30cc20…

MALICIOUS

PDF

68.7 KB Created: 2021-06-24 10:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0248d7653bfc5990d07c7a5515c29861 SHA-1: d8723b980a8131486f580fdab722ac5407d1d96a SHA-256: 6b0714f14e30cc20a7172ac9ee2cdcf07e0724db7448e67c34889563eefc3303
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, directing users to various compromised WordPress sites and other domains, likely for phishing or malware distribution. The presence of external URIs and link farms points to an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=baahubali+the+conclusion+torrent
    • http://littlepearlspublishing.in/data/eimages/file/divotam.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160867f890237d---ponepolenemola.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/0jrd7d30rvfmfdvb3fsvdn9d20/73703434351.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c239df34776---75795657610.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607001afacc9b---damin.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609530e84cd11---30743157213.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/d6b59bfebbfefd9dabdfaf9734bf8760/rotegetewotod.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078144966a4c---kapulejonotabu.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03f084d23a---vujevirasujibokodalofi.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609935338633f---tobet.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/17fe8c72995ed7a7deb3260e2a3ce9bf/81171960518.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da4b056c31---61753261083.pdf
    • https://jdrum-music.com/uploads/ckfiles/files/65897928582.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/52334pmc1b0esgurgc4ecuef7s/sififabuzaxata.pdf
    • http://safarang.com/basefile/files/30617129668.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd6f.bin
b5d4c9f2fe5f583c9ed27faf1427f57ff7626ea1a94424f3c33dc739d9d4202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6F 5076 bytes
font_01_sfnt_off0000cea2.bin
316ce8a067211272f15f2bb5bf448848e7bd1e694ff7882e1b90c26fce5a3e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA2 4284 bytes
font_02_sfnt_off0000deb5.bin
0775341c324ae18211c515ce078b1f404befdc131f3f4984034ffc240afe88c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 11028 bytes

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