Malicious PDF — malware analysis report

Static analysis result for SHA-256 0050cbb4ed88ba0d…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 03:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c68f2c8c475957e13f63058cea7a2bd5 SHA-1: 61882c2f46593ca11f5b0dece8add596ba5e8e34 SHA-256: 0050cbb4ed88ba0dd7ad4a0eced4e357990e52b0d70cc785e1e8ce05cc13897a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs and the nature of the heuristics indicate an attempt to trick the user into downloading a secondary malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f6c01be8e---medobafikuguvadifuvotupup.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5a5accaf0775f6a4c09d986517060f31/32395275204.pdf
    • http://webbyshoe.com/fckeditor/userfiles/file/28902248881.pdf
    • https://service-panev.com/userfiles/23034726611.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/bdac4580639eb76c3ff8f52bada7dd98/rumopababifoxekirawosuzoj.pdf
    • http://conblocmanado.com/pics/file/xilimix.pdf
    • http://bienbao.org/uploads/files/kenirisanujijuvefaburen.pdf
    • https://napraforgohotel.hu/upload/file/25077938641.pdf
    • http://thaoduocvn.com/userfiles/image/file/lezulolojukimol.pdf
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/28146659167.pdf
    • http://itagqatar.zajeltel.com/itag/file/files/boziwuzadaferimo.pdf
    • http://khmim.com/ckfinder/userfiles/files/59916290873.pdf
    • https://istanbulbalbir.com/upload/ckfinder/files/64037460614.pdf
    • http://alacarte-husum.de/userfiles/file/33277910683.pdf
    • http://www.urbanwaterways.info/files/fidajuzedor.pdf
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/fonotuvipazisijupik.pdf
    • http://sial.pl/galeria/file/66289584364.pdf
    • http://yuanyoujie.vip/userfiles/file/nonenemarelazifu.pdf
    • http://patrick-vallot.com/upload/files/31676114956.pdf
    • https://hattshopping.com/admin/assets/images/ckfiles/6175632506.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de2f2c0a65---ganigivosudeginex.pdf
    • https://prestinieurope.ch/userfiles/files/70823729744.pdf
    • https://oreopay57.com/ckfinder/userfiles/files/zigakuzufo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+battleheart+legacy
    • 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_off0000d736.bin
b2accc92c7bd54f5eb06fedaed5e2f0c5b833f8e916fa50662127b99ad86f22a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 18196 bytes
font_01_sfnt_off00010612.bin
25211667d99a3d5d99d148074ee1182ebaadb8f774c1d31907af7e8471a2522e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 10728 bytes
font_02_sfnt_off00011e8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 16792 bytes