Malicious PDF — malware analysis report

Static analysis result for SHA-256 61004e7ad9cd1cd9…

MALICIOUS

PDF

87.8 KB Created: 2021-07-03 16:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2c0854b68b104b9ad74693932123929 SHA-1: dc483a498957b6333576ec0fe5fb1fa94812d233 SHA-256: 61004e7ad9cd1cd99caf267930313a9cdc9b3b3a7866db99c6397127baa8cb9f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, some pointing to compromised WordPress sites and IP addresses. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JS suggests an attempt to execute code or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fredericjean.net/oplusco/file/97618317013.pdf
    • http://aweibel.com/Photo/file/45601049055.pdf
    • https://tahubunting1.com/contents//files/tixizipefaleres.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/luicsvja9b0dr2e7b540u073o8/kodivumaza.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210622_090312_1048.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c347e8ce5c3---53823082164.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdef99edb1a---padulugopedegu.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a5307d73b65---94379337456.pdf
    • https://bawwabatrizq.com/userfiles/file/56108650819.pdf
    • https://avela.md/userfiles/file/82089279461.pdf
    • http://cokhihoangvinh.com/uploads/userfiles/file/87459850785.pdf
    • http://www.contectrade.hu/fckfiles/file/vejotopejibepo.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b74520e4707---44515476031.pdf
    • http://karthikeyanjayaram.com/userfiles/file/lexuxal.pdf
    • http://abwlanham.com/uploads/files/94010445678.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ecinq7hb958tfcsfj1f6glmmvq/85127626837.pdf
    • https://fceresources.com/ckfinder/userfiles/files/tubusuxixe.pdf
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/19772839861.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/l6p79h08l812j50642oess2pr1/2024243518.pdf
    • http://smartarts.bg/userfiles/file/dikokov.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/593d8d7175c3b998075626ab36a11118/perotadevosax.pdf
    • https://zemiigori.com/uploads/file/zuvexepitovagep.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce3fc1f7a8---kakozina.pdf
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/sinedezalebagulopuxikut.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8d37479db---gidaxuguvivewudasi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=amazing+westlife+mp3+song+free+download
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d5.bin
16defe116230d4b320283d0349af67e3e9d8041303b45c50d0d74fd777c18074
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 17096 bytes
font_01_sfnt_off00011fa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA9 16792 bytes
font_02_sfnt_off000137c0.bin
fd006708e92d01eea0c886934b3ec7aaeb4c979b003537fb20209d09f90f7d38
pdf-font-stream PDF embedded font (sfnt) at offset 0x137C0 11140 bytes