Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bac272711979bf…

MALICIOUS

PDF

86.7 KB Created: 2021-09-02 01:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2674c5739112160a532adcceea427aca SHA-1: 282c011c7c70ce06c5092812b4770add120329cb SHA-256: d7bac272711979bf5b181be7409382d01b4b6cd49eea21f96ff56e96a1c750b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple distinct hosts suggest a deliberate effort to obscure the final malicious destination. While no scripts were explicitly extracted, the nature of the URLs and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://pixomot.ru/uplcv?utm_term=the+sorcerer+in+the+north+pdf PDF link annotation
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3233063dc9---lamuzofinenurizewiru.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/12976544133.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/ruwojerejedixa.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/99242015740.pdfIn PDF document text
    • https://mollis.rs//files/vuxad.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///jitijegufewu.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073b0cb3bde7---63615562865.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c85fc90b1eb---80552698935.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160947393da964---97861421151.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/27158357704.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/52063799107.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/43415412599.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/21458469458.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/08a2c8d55725015ce040d8ad9aeb1315/rulerame.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/5428280006.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac14d6d955---60317306990.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210828074624_5f0olx.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/36519876753.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3o571n53ntgsejlcilbsc3erac/pilowowezoxal.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/huqhv1h4ecafaqhcvk6qcun2ge/numebidipokisobip.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/favajorobutokisokiwurufa.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/25926923954.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210814061442.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/sulilowaniridupef.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e8bad0a9---xiberojugetajuloroli.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb71d191b82---lepugudivefizamulanuj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 18428 bytes
SHA-256: 0d4487310518f78cf163655d93ac6b4cc44aadbcc35a35fc819d056dc664e1ae
font_01_sfnt_off00011a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13248 10472 bytes
SHA-256: a7ade276a48cdae6e57327bd9156b769a76f327bd29dca704e7a36ca0068ec5d