Malicious PDF — malware analysis report

Static analysis result for SHA-256 205830eca6d67dc9…

MALICIOUS

PDF

87.4 KB Created: 2021-09-12 02:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1ee96df5df9c295d647118d5a46ca560 SHA-1: 0bc2b0193cac2910617f55fb51ac8f9724f188ea SHA-256: 205830eca6d67dc9a624c5aae6c60b9b505d32ce6c1c5f6fc60a766b4fddbb1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS upload storage and disposable hosting, likely serving as a lure for users to download further malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to direct users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fese.in/ienupdimages/images/files/roxifugexaperitomisene.pdf
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55636336291.pdf
    • http://alacarte-grafik.de/userfiles/file/mipariranisarikigugomater.pdf
    • https://renebeumer.nl/userfiles/file/84053180021.pdf
    • http://ecohost.ru/pics/images/file/66415662810.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/6b2fccbb325dde78d8dfe1990f5937a8/56369815226.pdf
    • http://forumcutuca.com/ckfinder/userfiles/files/51964331682.pdf
    • http://vitalchurchesinstitute.com/files/file/55930348169.pdf
    • https://cailux.lu/userfiles/files/jiwoguxirosadi.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0b1bc9febebbdd057d0d2353956efaae/mubawizakobogatefutel.pdf
    • http://pxmonastery.org/CKEdit/upload/files/8430328109.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94466803866.pdf
    • http://globalsublimation.net/uploadfile/files/73929004185.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/96934a40042ce626c39ee87c5ce68b53/3512182694.pdf
    • http://perfect-aerosol.eu/userfiles/file/68558794232.pdf
    • http://fijiembajak.com/uploads/ck_uploads/files/52593131272.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/etqpa5e5clam757cgjjgteqbj2/puvurananukurujusala.pdf
    • https://uslugiinzynierskie.com/eurostyl/photos/file/19899482615.pdf
    • http://villacappuccina.com/userfiles/files/58179704260.pdf
    • https://specialgarden.ro/userfiles/file/89226134599.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=watch+shrek+full+movie+online+free
    • 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_off0000f285.bin
a059019ab4ebe163b1a2327ce0d86c163f9d2e6a1536803f89c2066b527955e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 17596 bytes
font_01_sfnt_off00011fbb.bin
081c5ab05ff8259b82468353ad04266eb4ab2ceb4ea3fee6cffd2e11e59a2478
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 10852 bytes
font_02_sfnt_off000138b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138B2 16792 bytes