Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ab0efbebbfda4e…

MALICIOUS

PDF

74.8 KB Created: 2021-06-09 22:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62a7a9d790e31cde6d34728575486442 SHA-1: e0638a0982c6f31d9005f7e552f90d49879e6c7f SHA-256: 59ab0efbebbfda4e488b95230fee64e1f74f7dc116a863b679987e1e9705b55d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting it's designed to lure users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution campaign.

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://garglob.ru/uplcv?utm_term=here+i+am+lord+piano+sheet+music+pdf
    • http://blueyee.com/upload/file/170456187236.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/490tdmnu9v1hdaio8dp2rh7714/58860657398.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160875ceb15b8c---jovobutofo.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/14bca3537d5b0746a050d202354cb8fd/mipogepudolilo.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f4d53b4c8671f70ea4e81609a818a010/85450256516.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/0h2oueiha6r5og0darirf2eq36/sokofala.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36e0c6ee6---lanuwopexibidafi.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b954e33af31---wobimugupuperiga.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/fd714878e1cdbde79cd6bd9f8ff950ec/soguruwetaputig.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/00560652762f53e7ab567974e0a08627/kewizoketaxelaguwegotos.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/8tl6u08hpadalb7h1l0h6pnq8b/xudefurofesejamija.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d900a1672b---10780980047.pdf
    • http://caopump.com/admin/userfiles/file/vovojonebuvipotigovoxere.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/dc2113c3c7bb6064930a1af5f05d9522/sinix.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/64578222112.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/6d6cc75192ee69a47123241d2cf16ef7/pegis.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/159nrmn93ot3j2dkq15jro4c9m/55677384240.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e868.bin
93898415b0d8dbe0d43aad484c23a8e19518b259734c58efdba6ff224b12ba47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 5356 bytes
font_01_sfnt_off0000fa6e.bin
629b973af4b17e07d045fc7f0754c41757d16e7468da188f2eb0dba5dc4a9842		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 10288 bytes

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