Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e587c3fb96139a…

MALICIOUS

PDF

118.4 KB Created: 2021-08-03 05:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5edcfd5957f73156da13554c06b0b1f2 SHA-1: a09c5337b23814f0140a568cb8e6280bc69f20d7 SHA-256: 08e587c3fb96139a42675fbd646c76453aca072fb85969be079cfa9ce5586578
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and link farm indicators suggests an attempt to lure users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://projetounificado.com/uploads/files/51073651629.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/e9aa4293e3f55d014888bd69bc81bb53/dodudikubesiw.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/4c738cedcf629a021888815ca24caaf6/vutapokopavavoj.pdf
    • http://faxik.ru/ckfinder/userfiles/files/74495534452.pdf
    • http://consorzio-csa.it/userfiles/files/79446401653.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/17df914fb9aeb39973814511acbc9f2b/50866796100.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/71cc85ab66a716cd69bf97bfddc55f71/jagiwezamekusa.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d42b489b---suxurekenebofozaseridaf.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606ffce59de3f---nijusowiw.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7dda779c2---13534261418.pdf
    • https://baoholaodong24.com/userfiles/file/vefikol.pdf
    • http://trendymamy.pl/userfiles/file/29955248894.pdf
    • http://associazionemillesogni.it/userfiles/files/81684382354.pdf
    • http://escrima-rlp.de/userfiles/file/negedeninebijatepo.pdf
    • http://avtokit116.ru/!upload/files/43797425633.pdf
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/77299531020.pdf
    • http://writtenmail.com/upload_images/file/78226580621.pdf
    • http://clintonseniorhighclassof77.com/clients/e/ec/ec6cde7faca09d53f5ba1fe44cd32e38/File/mufat.pdf
    • https://chiuman-hk.com/images/file/55880243191.pdf
    • http://gld-lining.com/user_img/files/8084973412.pdf
    • http://handsonmontessoripk.com/userfiles/files/13784812131.pdf
    • https://kisikana.hr/userfiles/file/91932373701.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/godizomuruzaneje.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=kris+gethin+4+weeks+2+shred+pdf+free+download
    • 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_off000164ce.bin
0db125d4a87847c7b70f2cb7b1ced99f8ce670feca08d7c94e24cd0201632582
pdf-font-stream PDF embedded font (sfnt) at offset 0x164CE 11144 bytes
font_01_sfnt_off00017eb1.bin
7aac5aeab86d6900c6785ad2f1e99d833b9efa849fab278f5459bddd501340f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EB1 19048 bytes
font_02_sfnt_off0001b17c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B17C 16792 bytes