Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba7acc71b475122…

MALICIOUS

PDF

77.1 KB Created: 2021-08-28 09:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39a831e5e2cc37c66fafbe5266ad4ff5 SHA-1: 0bad79c44bf06b323e5e3cb4ee7ce2c1fbcec29f SHA-256: 7ba7acc71b4751224677fa5bf325658c6db18abe1977015bbd6ccc6efce5f0d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to potentially compromised WordPress upload directories. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to host or redirect to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609253ac4b740---puliluwaweren.pdf In PDF document text
    • http://maasmartcity.com/userfiles/file/37718508486.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/pufalopegegatu.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/13646069827.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/lafomugumozanu.pdfIn PDF document text
    • http://dalaichau.com/files/mugarora.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/nifaromobawafobusumat.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/99395364896.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/85929940361.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/237db0m5ib5cge68vmrbrqcp8f/98527385914.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/8335527603.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/dixomirafepibodize.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/84717980697.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e637c4a8---niperajilojuvinizunados.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/nagalizawoxugawi.pdfIn PDF document text
    • http://khacdautron.com/Images_upload/files/71895043029.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lifugas.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/gufipabubodewoxenujunan.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080f8beb328d---33485302533.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcf555372f---36821577697.pdfIn PDF document text
    • http://bakoca.hu/files/file/gebef.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263aaad534---fogin.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e44a11055e---romitomonopamugem.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1609e29285b1c21eca28d5bfea8face8/kizefoselovubofapopi.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/89123330312.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/36299998051.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/32220151449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=checklist+for+architectural+drawingsPDF link annotation
    • 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_off0000c9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 11064 bytes
SHA-256: 09de201a653de58d3d3ed86a5440d6397d6312808df0bd88f3c54150add9b283
font_02_sfnt_off0000fb95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 17148 bytes
SHA-256: f624e5ea5e6bd80f6ac52c821247c98d8b7b14d9a0c87ca00d5e172ffeb9673c

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