Malicious PDF — malware analysis report

Static analysis result for SHA-256 d039a60965e0a2a5…

MALICIOUS

PDF

104.0 KB Created: 2021-06-26 16:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12b664d081ed23b4e4489bb1807a0ef3 SHA-1: 7999845259849fd256fc4afbc57e5bb4502803a7 SHA-256: d039a60965e0a2a5839eddefe634c1e0b17acf51ed6ce11c48f73c9208376b58
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of numerous external links on disposable hosting strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/2dcc9eb86363e76575766859bf9fed36/damanon.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5dedf5bb9a342e233355b4ec77aeb676/12257104028.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/174c2bc70aa4a4ee4d04f3baeea9a2a7/wosixitazozagiripobibamu.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/vlgn0nni572h0021sji6livfkoqe2s68/momosaru.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b3ec4b11a---refosesidemimakekifog.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-6-12/20210612125034661553.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/xasenulukasukitevalirajoz.pdf
    • https://zlato-eu.cz/upload/files/sasuzupafavexokulom.pdf
    • http://gesundimjob.at/images/content/files/gobubedagogadapafokaxel.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/6hqufv4205h9sd9ibk82ns3dq6/33570272076.pdf
    • http://coinproject.com/userfiles/image/file/57180329727.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/kgtusq8l9klf1tdrua6c24d7vo/worifemapejaxosejexe.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/m3h8rvqq24cl6cqpa8tq3fiaec/82156963145.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b4b7549e512512e5f580e0725a17becb/pivakax.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7370a70e3f---jurodewukufatigulemona.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/22491279473.pdf
    • https://arch.ua/ckfinder/userfiles/files/25591610728.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3837d06460---togukisorijugugamejusoge.pdf
    • http://boothbayharborshipyard.com/userfiles/file/24047240933.pdf
    • http://alpha-th.com/userfiles/file/33263472875.pdf
    • http://afghansolar.com/userfiles/file/kasamademugujikiso.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096854d3e7cc---85456630267.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=clash+of+clans+town+hall+level+9+layout
    • 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_off00013114.bin
97c9802f737b0b702c0bc5ea5e06f9e55ec15020ee4ae6be5bca9ef95ea35675
pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 10808 bytes
font_01_sfnt_off00014a27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A27 16792 bytes
font_02_sfnt_off00016239.bin
d9a37850206d549c4d95b05d76af7d0c6448f89c05483f0bfaf94d58fdeb4a59
pdf-font-stream PDF embedded font (sfnt) at offset 0x16239 18376 bytes