Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b11fba048bd404…

MALICIOUS

PDF

72.7 KB Created: 2021-05-29 16:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff0d27c22739482c3827a73389ffa75 SHA-1: 6ea4a19f52e10fd6d7283c4bcea63a492befea30 SHA-256: 06b11fba048bd404a056918cd90fc6a482ae4d2ace0ef57ee2911a929113128d
156 Risk Score

Malware Insights

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

The PDF document contains multiple links to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though heavily obfuscated, contains text related to downloading JDK, indicating a lure for users seeking software. No scripts were extracted, but the overall structure and URL patterns point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607382fbacf46---fuwibogapivap.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e7ecd8eb00c98f378d89f1bba23a7c4c/toditevogudo.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701d6709c49---59308343093.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdbc758e5e---wosoxerabinagexikidux.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608783ba7b7eb---34343680636.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f2a1737d392ef8d8ca13405ef187dd27/bamoduvuwuxejiwapi.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16075bbe1089d3---jaxexotewemejawi.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/04f1b5140b7ecf9dc537261a447129b9/jurute.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/qnnd1alctsjuo22eoaecp23rbk/kejepimovibazes.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/2er6f67nm75e0jr7e1lhnoj4v1/ziluwolerov.pdf
    • http://0-50.ru/userfiles/file/28709880786.pdf
    • http://bettynblue.com/upload/fck_img/20210522/file/24209459382.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082cdecefcfa---vanifupodogapime.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/m572uqvqa7pnf6e0jvb3ombm1f/dadenuzozurefidawaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=download+jdk+1.7+for+windows+7+32+bit
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df05.bin
8a105fe161b2168c7f7892600f710a7c9bb2965d81119392d3b2910aa18899ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF05 5732 bytes
font_01_sfnt_off0000f2ca.bin
f1967052e4d6538ec2d4031dbd67ac6c3c1a28ec6c28220dc96fdf3db40ed295
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 10384 bytes