Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd977be2c44836b3…

MALICIOUS

PDF

84.6 KB Created: 2021-07-19 17:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf765ff5c31f44631f07d5c56ed023ef SHA-1: d036c9ed411d1f365e5d9598c932105ff75b4f17 SHA-256: cd977be2c44836b32fd78843fd2f6482cd8710cf043f661ba82d4d1cb326b930
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://albertopizzetti.it/userfiles/files/pinowejeduriweduderunelan.pdf
    • http://areaarchitetti.com/userfiles/files/21394742338.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f214b8867e---57823704806.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5e94ae3bedb51f136ec7f13c25509062/94650455386.pdf
    • http://goref.ru/files/file/vilavow.pdf
    • https://panificioilcavaliere.it/userfiles/files/riwuzexunojupat.pdf
    • https://fentesmakina.com/paket/upload/files/80508365690.pdf
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/49554872490.pdf
    • http://flightshop.jp/images/blog//file/64855140511.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a568d8590---50958653300.pdf
    • https://arerp.kr/data/file///60935708160.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2ab6cbe746426c099aeaea2928e3311c/tizelobitopowazuxamerisi.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/98b956e9373fd9e4a1f4705e900cac91/96842438420.pdf
    • http://esistore.be/userfiles/file/38612969770.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f639ca4c4---63901613294.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65b548a837---jumuxepuku.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b970d3c3dc997bea4c3638a779f8a68b/zajimisoradizewubi.pdf
    • http://asbazainville.org/userfiles/file/44512956866.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94ce94d2b9---galuwinuxuvuzeselofam.pdf
    • http://slp70.com/clients/873855/File/6511479445.pdf
    • http://baudoinfamily.com/clients/f/fc/fc66627f90e8a365851b026dcf169025/File/96994963782.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160868c2111fb9---18316357213.pdf
    • https://gastriklandsbf.se/UserFiles/files/27030239755.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/50826826544.pdf
    • http://driscollandgibson.com/images/edit_images/file/9853788894.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/14550286063.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=are+rocks+made+up+of+cells
    • 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_off0000e3b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 16792 bytes
font_01_sfnt_off0000fbd0.bin
e1dad48a391d942bc27147b85f5ec153d11ac842f20f026d4afe3c3d094bb7a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 10660 bytes
font_02_sfnt_off0001144c.bin
973a89a9b8fc019804dfd667bd16a92bf87ca952d4a29f76d5347fd18f2fcc3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 18368 bytes