Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9b201dde099f97…

MALICIOUS

PDF

98.6 KB Created: 2021-08-21 09:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d7c74305795572dac86cbef0acb4b79 SHA-1: 8aadcf99531317b6e2d45b8d21ee0e9e57c1dc10 SHA-256: 7c9b201dde099f97b8a2f8bfc0258cd605439fcbe0d157be57dccb9591d55bdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://laborke.ru/uplcv?utm_term=naxeex+superhero+apk+mod+unlock+all
    • http://moreit.ch/productinfo/file/54135974739.pdf
    • http://phaptangpgvn.net/app/webroot/upload/files/17204457927.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dj6ovvnoqvo7d7ush7gtgng091/57112692385.pdf
    • https://inmaabiladi.com/userfiles/files/rewumusiguxe.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/1hrehs9nn8dckarvhr3a6nfjgt/xexolarizolu.pdf
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/zoxametokodewatukogu.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607994bcbf671---8069745507.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2d8366784657a77980980fd2d2e6ff6b/gusirixatafajogapopatijem.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a320a913d73---karenevudodadusevafokeru.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607faa7765a8e---14020052249.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/2ce581e777503ea910de6f2b5477cf53/85732809178.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/59067688245.pdf
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/8444803924.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/937c0f02847a92f155e01378274caae0/tibarazemo.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d9183ab81b995fb723ef26de0af0b530/78930500282.pdf
    • http://gardatrans.com/content/Files/kemexapitepaneminosuxufo.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e83ef8f491fdf0e657457e89c53ae2a/gavepuw.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/61a0ee86766c639a47e608658fb92080/xenusekixipodafulowewi.pdf
    • http://www.iece.in/userfiles/file/24361275074.pdf
    • https://rallstarawards.us/nbloom/fckuploads/file/tosusen.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6085db81a13ec303fe67e086f933dbdb/81999475015.pdf
    • https://vanchuyenduongsat.vn/upload/files/tedawusof.pdf
    • http://yilip.net/userData/board/file/37049666781.pdf
    • https://cepatdaftargroup2.com/contents/files/bojikenoxusidaxuxovibato.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0249c6e5492c4722f8515489bfe8c917/3390438227.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a8.bin
6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 16384 bytes
font_01_sfnt_off000119f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119F2 16792 bytes
font_02_sfnt_off00013209.bin
4d898ca2c59b5e5bee495006979406566fc019e446345a82525600456e4aca27
pdf-font-stream PDF embedded font (sfnt) at offset 0x13209 10860 bytes
font_03_sfnt_off00014af4.bin
f15656a468db37294d758a40c0403877bb5f18d23fdeb49cdb43fc4e560e129b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 17616 bytes