Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aac404c60b7bdaf…

MALICIOUS

PDF

86.5 KB Created: 2021-07-05 15:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f61677c1b4d898d9dc9e0487e309dc4 SHA-1: 944c2752a46875bb8bbf52ab271d1fc0beec5e73 SHA-256: 2aac404c60b7bdaf1dd1102ae8944fe2082fd4fca69d27d0abd6ba195d1a9e17
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d4bd083dc---33009056934.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f5e6fed5c16801881f279424f4358e52/vewimutefamola.pdf
    • http://palyavalaszto.hu/teszt/upload/file/68673475349.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/96707871080.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/d8qh1v3kq0d54mbquqdih9fjb0/masotaze.pdf
    • https://elesud.it/img_pagine/file/laxidafe.pdf
    • http://adamlegal.com/userfiles/file/zedazebiserorutilige.pdf
    • http://arcomproltd.com/userfiles/file/kuwagudeduxogopikuruwemi.pdf
    • https://cafe-malaysia.com/contents/file/79524364610.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16087c3209d419---nevotajibibixobolaz.pdf
    • https://tanthuantelecom.com/upload/fck/file/18623974214.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/verodotukinowesa.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/1a0cbdea0885a9fdead46035f33b94ef/kebudewelupu.pdf
    • http://densayhongngoai.com/uploads/userfiles/file/besowawukib.pdf
    • http://nwatchonline.net/userfiles/file/kofewimutimaxuwuvumororaz.pdf
    • http://pivotal-technologies.com/userfiles/file/mimam.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088beb127e30---70333805836.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/mq3qtvi7u2gso3ujcqh95bppgn/mikupewujudel.pdf
    • http://mitsubishilongbien.vn/images/ckeditor/files/66650180947.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5969cc893---19858861768.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/hofoc16c0nlneh8cl2dennoh21/pakabagimatiwaxo.pdf
    • https://brianhigbielaw.com/UserFiles/file/kutepukegawebeni.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/7839b3dde541c90a9aa0ea991a2d93a1/vurozelulenimozulopib.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/9cee46c58642d0490e6a970dc9bf433e/38951005449.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee71f112dd---nagisodumopotozedumi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=daniel+boone+forest+map
    • 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_off0000ee34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 16792 bytes
font_01_sfnt_off0001064b.bin
54478922c902ffa7cd03a91c964a2f5dac2902908b3a8350e913d2ad5c3e2e75
pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 10660 bytes
font_02_sfnt_off00011e78.bin
77be46b8fac9b9346811b1be980b28ea44f65514aeb420048e73b8b3565af430
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 17588 bytes