Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48392d4e026ade4…

MALICIOUS

PDF

75.9 KB Created: 2021-06-29 03:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9998e78db2ea6b4e558632936a37f54 SHA-1: fa7c386de18ba1d187e13fb92cad3a3f574d2b9e SHA-256: f48392d4e026ade4788d7364c119f5b92c06e7f7d87dce1958b642e9365893f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it is likely a phishing or malware delivery attempt. Heuristics identified it as a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS upload directories. The PDF contains embedded URIs that likely serve as lures to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://amirafouad.com/uploaded_files/file/kelojelivizadafipow.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077518c27310---gopepidakubobexexun.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160742662d6597---donowix.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/64d256ce345853f7553a208302f0762c/sifofilisatozaxil.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/bfa7d9d39c0ef3a7980edd4fd89f4555/favulodes.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ftaklmv5mfv1uutoc8bu8a1g3e/tuzeruremujugaji.pdf
    • https://cuacuonbentre.com/upload/files/31981094094.pdf
    • http://adance0112.com/upfile/editor/file/simur.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/lftdmih89916vmdhtc3e4rnjr4/ziremozuzorulufiniz.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f07803bf75208fd36b2a118e855a36a3/suvixawefogaviw.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/2gfrgntfgtodcp0b9pfgf09hpd/kabovuwejuwuxuwix.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608affa856b6b---54776960378.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/fb3ef518b995af3c36844f524ccb0bee/23576443220.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/db36508549d8f072ee0ad6d6b7423e8d/95423125868.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fb5a62c80bba7f05bf3b6e3f949acaf/vodepi.pdf
    • http://maroba-zirndorf.de/file/lidujuzixodigamujozama.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/58c8227f38b9976348c0879ecd89a1d9/jufovuxifokapizazet.pdf
    • http://brainbond.ro/userfiles/file/narodiwozi.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9afcc9dd35---lurenadovuxuginimut.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/pokegemusedusurarid.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075df172e325---14326211226.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acb275dfe05---18739165692.pdf
    • http://hanart21.com/files/userfiles/file/62234495806.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=file+name+meaning
    • 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_off0000cb80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB80 16792 bytes
font_01_sfnt_off0000e392.bin
7a5644e70172e845a56ee1ff8d656a7d67b837a901471a0af85016ff90607510
pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 15952 bytes
font_02_sfnt_off00010cb7.bin
d90fcc9469d455c4b3010d3795b8c6acd72ffeb005256e39cb5dad8b9b033f16
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 9944 bytes