Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf2d151d0d0a67e…

MALICIOUS

PDF

68.7 KB Created: 2021-09-10 15:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 84777c29430fe12733dfdfb51562cb71 SHA-1: cf6638f4076bc23857ed90708fdf811f6a77a63a SHA-256: caf2d151d0d0a67eb04aec1d843774c83bd311b66357528b19bd5255b0a20fe6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://elegune.net/files/galeria/files/sepexubuzukavewe.pdf In PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161385c70d67a2---zutowiri.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/13847215890.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109011508595476.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/weninuzemuxejevesizuxet.pdfIn PDF document text
    • https://wrd13.com/force/file/3112669724.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/71553249816.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/rulezesojifene.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/42137165301.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/vazuvitovutezejipexixol.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109040457271969.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/patosenigimodupejan.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/7724652520.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/83928828142.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/55966060228.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/tofagagil.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/38678492633.pdfIn PDF document text
    • https://everestart.com/images/stories/file/21806592834.pdfIn PDF document text
    • https://fototipia.hu/files/files/34107470855.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133a7b6f0300---moxekepebosawima.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/rawizelibup.pdfIn PDF document text
    • https://adikkedua.com/contents/files/donizipabovogutajuxoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=index+of+the+vampire+diariesPDF 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_off0000b01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01F 10836 bytes
SHA-256: 3e0c4c9911ade29880c19bbf8212ae6f7f364931fe4fedbf68a7d4321efc0f92
font_01_sfnt_off0000c8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 14520 bytes
SHA-256: 5c0cc17fe250b97d3f2c93489c5ed4398d32456a0d50c0fe8ac6bc50c272e27b

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