Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e111f2ecda05df6…

MALICIOUS

PDF

84.6 KB Created: 2021-09-01 14:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de9dfaf071fdd57e41d1027515b0c7cf SHA-1: 19f08cef1fa840d44c076a76ac76e1d92e67bbf8 SHA-256: 4e111f2ecda05df6858c510b88fd496d5b99b1e98bfba84a8c1d564d8ee4a764
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of multiple external URIs and compromised CMS upload links strongly points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://philabc.ru/uplcv?utm_term=art+for+beginners+with+pencil
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/e176ce3d350722e30d67570ef0cc5bfb/vaginozemevuwafegip.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160796334cb34b---pejopezi.pdf
    • https://livre-art.com/ckfinder/userfiles/files/xudobivototujokuvenanuf.pdf
    • http://masterkontroll.hu/ckfinder/userfiles/files/12552240422.pdf
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/mudijerewapatikapif.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d33b6e9aeeddd6406e5c1c4d77e37f5b/guniguvevunabuzesexuwe.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee6744eed---kidararupalujujamaxe.pdf
    • https://prtl.pl/userfiles/file/gokudogane.pdf
    • http://mdsalon.ru/img/lib/file/fazosijelakidefewixelawof.pdf
    • https://caribemed.com/userfiles/file/najixejudowu.pdf
    • https://alternativecarrepair.com/userfiles/file/wexafifemexawu.pdf
    • http://capital96.com/userfiles/file/48242565152.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ad41a7cd---88526229747.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/laregifixijabasiveda.pdf
    • https://keralatemples.info/ckfinder/userfiles/files/rinapuvuvivipinoriji.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e7f607421aa1eebd721c6c24a34a4e8a/93540278670.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/365b237ae8270c1c65c18aa92c8cbf18/mowikuxaxiwan.pdf
    • https://lodoshosting.com/calisma2/files/uploads/sajupolivujotolagapasa.pdf
    • http://alimentosldm.com/userfiles/file/virizebavazizuvifuji.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0dfe9bf93c4055819ec771f7126dda06/90537344599.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a8d85882783d752fa75dcb4b9e1d9011/7516733152.pdf
    • http://designbyjoseph.com/uploads/File/zopiwetuxotexedowisar.pdf
    • http://dermalab.pl/userfiles/file/37255140827.pdf
    • http://archimax.ch/dynamic-images/cms/file/wumolepome.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/17e0587b4c88164c6622cf87e3e360a0/74082970254.pdf
    • 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_off0000e7ea.bin
bc3c414658f097943d1aab3128469d41f768886f47ac2a32d9ba1bf190de1e60
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 16976 bytes
font_01_sfnt_off00011348.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11348 16792 bytes
font_02_sfnt_off00012b5f.bin
bc43b1dcede1b0b8cf66022d28217ed9b08f52c7168a8a3ea478f68bdf67a0f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5F 10804 bytes