Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea9cd5777c97056…

MALICIOUS

PDF

103.4 KB Created: 2021-06-30 06:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9680bcf44c412357963f4275a38a0619 SHA-1: ef98a43c5f289fbf42e129f08b21664cfbcdfcac SHA-256: 0ea9cd5777c970561ae4edbe39af4d3ad4c8e7b836fe213e026ce725324b47da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be malformed, likely due to the PDF generation process rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://infrive.ru/uplcv?utm_term=least+common+denominator+of+8+and+5
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/be6c6964f96ba7f8e4c9937ec371fbbc/92479833822.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d99f773a9---8578797988.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a8bf4753c---62319443271.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/6f3dd85900d7b8873d6b27a23557f991/85794448819.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609358dd4da53---49333332223.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/49f7bf199c31c7704aa13c2e7b34d5c3/74793084958.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7264a6d00---junemuk.pdf
    • http://logo4you.dk/userfiles/file/15899024595.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/homd9q5o02unlkisachhfesp07/nojewuripon.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/48efda01d3837dc58344e14b6759bec4/61301215295.pdf
    • http://agro-vostok.ru/userfiles/file/nibil.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c9bf5264d---76587315454.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798027941d6---93997595560.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7f4ac74b---lujizujoropuxa.pdf
    • http://kursadowicz.pl/Upload/file/suwipedokofemif.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/86982041224.pdf
    • http://artetendasud.it/userfiles/files/jozigoxu.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/d5c60ed80596d51bdb9a83a8c2ac65c3/82143072786.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/7ce706073c528e783161be006165c142/96891909809.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9af55ac52e---39203091538.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ad40298f---famowi.pdf
    • http://dalaichau.com/files/tixapu.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/66a1cbddbefb3552c9f5d61ebdb4beef/56718413205.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f0.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F0 16084 bytes
font_01_sfnt_off00012c1d.bin
e3a36f9f735fc61b5c2df09d0128003bf8392e1fa59414625c20f982cbf3fbdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 10888 bytes
font_02_sfnt_off0001454e.bin
037753a1363471df0e11b51119940214375f86a7a05a5f882ea205417ccd056d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1454E 18732 bytes
font_03_sfnt_off00017771.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17771 16792 bytes

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