Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e72c554ac8ff4d4…

MALICIOUS

PDF

86.0 KB Created: 2021-06-27 10:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cd6681216ddea0ec98a15464f87c412 SHA-1: 183f7802b4db07a81a69eb032b6ccde680f1a850 SHA-256: 0e72c554ac8ff4d42e043a960cd1b3e47ccdb115d948d0fafbe4d6df418679a5
156 Risk Score

Malware Insights

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

The PDF document contains a link farm directing users to numerous external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://tavio.ru/files/file/nitemopus.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/xilekivabizufemuliporu.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/3da14d438a0e947b12c505b623cff991/20212329022.pdf
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/lisagapuluk.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/i49s5h21dgm0ff5hpfti20ae9u/83879055576.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a892a1d84c6---xuxenule.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2499724c74---pajixelugegupegutaposobu.pdf
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/96cf24eb5f2a92439845264be5559448/bunupiguze.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0a3b15d0ff8945acf35a3576ff29e5c1/96633756322.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/53356994101.pdf
    • https://al-farh-iq.com/upload/userfiles/file/25847948992.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606f188e5d8ee---lakuni.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c9403002a73---24449703077.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/lidt48n3n0eefg68sfg9fp74ud/92165877183.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nl9leaul0k7e8ojdicbklv5cu0/50179924308.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608beb44d4062---jimorefudo.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/45fnhlql3h4d9dc3bl90eguvbo/19746040262.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee54c3a6d2---97546861136.pdf
    • http://enjoy.sk/editor_uploads/system/files/74056725311.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/60308498427.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc099b7ca9---41073198738.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/e9bf1ff101eb0663d1c4cc162ffb2098/xofagoju.pdf
    • http://jrpst.pl/userfiles/file/3665368640.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072642a6da0f---gijabavadusalopaxilekuke.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608f73a90d1f0---80808078038.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=lemony+snicket%27s+a+series+of+unfortunate+events+soundtrack
    • 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_off0000e980.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 16792 bytes
font_01_sfnt_off00010192.bin
d4e598b935712fa46c1a5b0b882b36c0234c0810ce43fe522490d5fde2dc6fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 17816 bytes
font_02_sfnt_off000130ad.bin
3294f1d01db2c60c18f35e7e7496c48ac85dc37fe50f84911ad6595bd54a4a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x130AD 10956 bytes