Malicious PDF — malware analysis report

Static analysis result for SHA-256 5658cca59f34e021…

MALICIOUS

PDF

71.2 KB Created: 2021-09-08 06:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e697731eaf0000c1361200eacd3dd6fd SHA-1: bfe3ae8814c5b6c24ab713e40ff7e20e05282045 SHA-256: 5658cca59f34e021b265c615a07c21169456bd0caae986cc27669c46edc976e4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded links align with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://vayamcs.com/content_files/files/tipirikemapaxurofixiwokog.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/75da9aa6f0c41d5ff46f6bf20d4ef27f/rakamola.pdf
    • http://jorkurojus.com/userfiles/file/14717283567.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ec9d4b7814dc5d13adcc86746a2d6af8/zibojudekovesupunolegisom.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085af2954d2b---vebuxezijuvekotapofowuro.pdf
    • https://gotoko.com/cmsv2/upload/files/68345862872.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160932f0bcff7e---kopozedatad.pdf
    • http://hasyo.net/files/file/zuluvupab.pdf
    • http://jingyitech.com/uploadfile/bagixuvekadoligefizigu.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/nexetelodebava.pdf
    • http://centromp.it/userfiles/files/2101797113.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/d8ae6a818d916535f7c6f4fb8c652d1a/47205816578.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aa530300e---pufesoda.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608908af20f35---95719149629.pdf
    • http://letresorellebio.it/userfiles/files/49424722320.pdf
    • https://stancijanegrin.com/UserFiles/files/guvegeku.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/60irtnss70m5a32h9l1qijfti5/wosegedawafulolalojiwuvo.pdf
    • http://novafish.it/userfiles/files/zofusojozirofenamene.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9830ab13f---34254233219.pdf
    • http://morard-mcf.fr/data/Files/68870778817.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f450937d04111de80281449d9aefd3dd/75284189205.pdf
    • http://boxerdapolenta.com/cmsimple/images/file/45131000532.pdf
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/wadumomojupewimuwugizemox.pdf
    • http://heninrealty.com/userfiles/files/13081421900.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/jo3mqre4ou2stgmabfdoa9d8d1/mukexipigurab.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=objective+soil+science+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_off0000b5bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BF 16792 bytes
font_01_sfnt_off0000cdd6.bin
42a93e5dc8d6156b5e81cd847c81867cb78fed1be5b1fe05f580306ac0bd66e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD6 10712 bytes
font_02_sfnt_off0000e64c.bin
9ffde38b8fabb3baab2295c35af7d3369dfbfe65860d0244339143efce31791f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 16916 bytes