Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a264cc80fa97277…

MALICIOUS

PDF

65.4 KB Created: 2021-05-06 12:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8cd0a44015ea2a23b84180ff5a742f7 SHA-1: 6d9bafa007c4fa53e99f1a2331d0132b36d761a5 SHA-256: 1a264cc80fa97277ac30badbcd304470e505848754b49ac87a169c0f5301249b
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to song downloads, which is a common lure for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ddil3hodcmuehgib3uc0cbpgo7/kagebevobesitotepezeg.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/dff908ef0b1675ddf1ee40c816291b30/gidivazatawexadenipud.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16078ef69b568e---zakorerapetuzujimo.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078a44c44efe---bazajofewarejekujoxezokex.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/c566o7fogrqe92d6di152qgt88/jutodi.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/scg036gt4klrkttu134g801p1k/dalimetizelasagujunelifa.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/6ff1f2948a071b59a353535c7da05a53/gogotitabufetejivevevog.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/vk5rg4ul40rcpji4mdlcnb2gbs/84211850947.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072aeed70398---31841794593.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a24a6155c---50147575684.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece45db7f4---52552440258.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160914ac0e1550---salujirisugavuxewe.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160730863cd482---34536444515.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8056eb1b---37263305000.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/6748bd49f5af66e6d8c49c30cfb09d56/5065356479.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fh1sbrtb7rjbhn7ff2cbphhu81/78125699288.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=zihale+masti+mukund+ranjish+song++320kbps
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75e.bin
8e67fc2f68f8cc48271285b430ea14656d1074e93e4f15fa61647b6670dc14d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC75E 6048 bytes
font_01_sfnt_off0000dbc3.bin
9c19ff003e0caeedd2a133f8b9ed3d50e5796e9ce9d6f4a1ed68e0bdfccc82e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 10260 bytes

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