Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b9675a57f40636…

MALICIOUS

PDF

72.0 KB Created: 2021-09-29 07:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c041ff55f9f9bef7b7446cec1d9dda3 SHA-1: 86fda88424410a475e69288529e385161befd47e SHA-256: 93b9675a57f406369a2e96ca3c8d9c9acbe2c5a36b5915b088e028524063370f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded links, many pointing to unknown domains, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ancient-theater.gr/media/file/911141657.pdf
    • http://dainichiji.com/upload_ckr/files/geroseranix.pdf
    • http://clinicaveterinariasangiacomo.it/userfiles/files/wunikatarazezalogisudus.pdf
    • https://sssmri.com/ckfinder/userfiles/files/55522845347.pdf
    • http://beveragesgs.com/userfiles/file/zasowi.pdf
    • http://koutingchina.com/upload/files/tupobaluvejuvokejuxet.pdf
    • http://cellfruits.com/ckfinder/userfiles/files/nenikomavapowovilokorupo.pdf
    • http://oshcongregation.com/userfiles/file/83369383701.pdf
    • https://chilegastronomia.cl/uploads/userfiles/files/39488845418.pdf
    • https://alrukn.co/userfiles/files/37763326260.pdf
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/32546614241.pdf
    • http://nbnjl.com/userfiles/files/dolixuzagokavuju.pdf
    • https://alident.centralcms.cloud/galeria/files/43471780031.pdf
    • https://griby.biz/ckfinder/userfiles/files/88071060855.pdf
    • http://www.fdconsult.qa/public/uploads/cms_files/guvalerilikitaluv.pdf
    • http://gadkowski.pl/repository/filemanager/file/20654426393.pdf
    • http://portableandcool.com/files/files/buvafa.pdf
    • http://paradisetnl.com/FileData/ckfinder/files/20210916_941DB4CBE1E501D7.pdf
    • http://pho32shabu.com/uploads/files/25351670600.pdf
    • http://gurukripapublicschool.org/userfiles/file/feravololimewel.pdf
    • http://cameranichietsu.com/luutru/files/devafifajarozofij.pdf
    • http://prochem.vn/images/uploads/files/tajisupuxuvomurawi.pdf
    • http://csc0532.com/userfiles/file/20210927181534_ov4i3y.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pubg+indian+version+apk
    • 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_off0000b057.bin
eba42e363af6653a3ab85c599df441b009ab25c01ec7655763801e931dc24fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB057 19352 bytes
font_01_sfnt_off0000e250.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE250 16792 bytes
font_02_sfnt_off0000fa67.bin
ba3c7615dc4b671a3927d0cc9479d535d386032dcab4a45eeb0e4c8b44e4dbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 10820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.