Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae7ea4b43361671…

MALICIOUS

PDF

83.8 KB Created: 2021-07-01 11:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aab684fb23c7d734b6f6649ac4c5ff61 SHA-1: 192176f5935d6ab91fe2c3174d5c582a96e9d1e2 SHA-256: fae7ea4b433616719b1de74f062c35f5181a672464c986508cb0588b26795740
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links to compromised WordPress upload directories and other potentially malicious sites, indicating a phishing or malware distribution lure. The file's structure suggests it is a link farm designed to redirect users to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://drafthe.ru/uplcv?utm_term=chemistry+comic+book+module+c+answers
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/0f5nlf55p8sh4dgqs2u3lqn39v/boxiwonorulemunizu.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5f5528106---32155621650.pdf
    • https://flardochform.se/userfiles/file/fumutotoxofefomulotevej.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b550a4604d---siwumuw.pdf
    • https://mangonebike.com/uploads/file/59616339213.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4ddedd5af33b9ad40251aed4157c3c99/60225472135.pdf
    • http://thucphamchucnangmy.vn/uploads/files/rujojarekigomipof.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a41b2467e656685ee42459ff7c675940/ronutesebuzubof.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/nha526aqgmjvb2cffdntfnjea6/87891749692.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a769283c---repimodakuforujaxigi.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/4dd6590b3a9e038e3e18ef35ee2b5469/jaxumojaxujate.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/af8c2dec96f8c4d6049c2043e0eaec65/kopoko.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/977121b71490423a3ca224d543aa4e52/22729840629.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/edfb8ab40991b4c4b73a8cfc17d0b71c/zaxix.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a7da91e3a37---kusomotaf.pdf
    • http://artepcb.com/upload/files/76147891850.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/56750126573.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/t126p1ftltnak7a46kt51jcgt7/figubaw.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/d8a9e9a63b01d87f04ec3348a0943c78/52042099207.pdf
    • http://salukool.ee/upload/userfiles/file/kukoza.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cdcac0c81---vizag.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9794dfd882fcac21a91f426c6849a362/19508476362.pdf
    • http://www.hydro-tg.pro/upload/file/90673661434.pdf
    • https://socohoteldanang.com/uploads/image/files/13445620978.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2769c65b9dabce4479ed99099c62916b/72082185962.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_off0000c71e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 16792 bytes
font_01_sfnt_off0000df30.bin
8fa0a01e952f3444ea09563df4301a0bc095b95ada485e1c9b79325cbc56ab7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 15632 bytes
font_02_sfnt_off0001072b.bin
aa11aae27345bed006d0ab0a805855d2a48c681442df1e1d0c68ac761055b415		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 18464 bytes
font_03_sfnt_off00012522.bin
844ba2dde52d783ac538d1af3e5966e078f9a1cca65031cc1c7c75d63e45c911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 11196 bytes

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