Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d607c9627137e32…

MALICIOUS

PDF

86.3 KB Created: 2021-08-13 17:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4e4d9acd1f49dc0bfb8b0da1d810174e SHA-1: 52e1ab89c874f39f47b1b6367752fc400826eef3 SHA-256: 6d607c9627137e32f5652b83c37a916dc10cbdf4031443d37b6bd53d288f994b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous external URIs and links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The embedded URLs are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://allytemp.ru/uplcv?utm_term=nihongo+so+matome+n3+grammar+pdf PDF link annotation
    • https://cupanghitam.com/contents//files/kowasonabamab.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1534b2019---warugu.pdfIn PDF document text
    • https://badoza.net/userfiles/file/97474454850.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/52317553903.pdfIn PDF document text
    • http://casaalu.com/luutru/files/pulumezaturo.pdfIn PDF document text
    • http://talleresjpg.es/img/file/6524961079.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b686c10557---danavisukapomep.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2e5eefd9e---73743351885.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcefcd09a---46993449278.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf55f0ef50---9427055310.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/97126483849.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/rokuso.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/femelewukudedupikob.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/53783499281.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/timurisodokevafususasegu.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/49904517229.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/aiagogqqtvl3s8roh3go6hilf9/82937644522.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/rajaketu.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/pafavovomilerawilefososo.pdfIn PDF document text
    • http://faradbox.pl/files/file/vapabax.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/d5caa8e783995de32a950ca811317d2a/81297973290.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/bunibokekag.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/banasideluwibabez.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 5248 bytes
SHA-256: 54067aa07dfe397735e3d32e85df331cf5950aad7119f613236b44ed03401271
font_01_sfnt_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 22052 bytes
SHA-256: 8f043704900aa540287d02108f4e0d20ef528107b5577a6c66f501744a3a6244
font_03_sfnt_off00012f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F53 11048 bytes
SHA-256: 5948813f58136c7131f506458360ecc3ae03a8fee23810fd0feea6486f66f240

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