Malicious PDF — malware analysis report

Static analysis result for SHA-256 50095a6989404d57…

MALICIOUS

PDF

80.3 KB Created: 2021-01-29 10:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a0705964ec2642b9f55ae780d7338e08 SHA-1: 3edae33ce63a486bd36f7cd0125da0a9741580de SHA-256: 50095a6989404d572d32ac02ebdee0d8109c523375f9ac3c3ba1e442d8be5fbc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a likely phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=how+do+you+say+hi+beautiful+in+italian PDF link annotation
    • https://wowiwega.weebly.com/uploads/1/3/1/4/131453904/falexopamani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5ffbffc3300e1.pdfIn PDF document text
    • http://helpverifedbadges.com/boom_beach_hack_appf0evk.pdfIn PDF document text
    • http://aycotoro2.xyz/lemunulawlcrk2.pdfIn PDF document text
    • http://inostrana.com/wenilimewimazi85m00.pdfIn PDF document text
    • https://gagopono.weebly.com/uploads/1/3/2/6/132681316/1ce8cb30.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/terugesog.pdfIn PDF document text
    • http://raifaisentapp.online/26328225648zhgb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389585/normal_5febfd2b76abf.pdfIn PDF document text
    • http://matroskin.space/forks_over_knives_planyqm11.pdfIn PDF document text
    • http://naturfresh.space/materiales_sisat_2019asryq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_600b5db0059cf.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/a969bd233.pdfIn PDF document text
    • http://bijopesenof.iblogger.org/fosobukigenu.pdfIn PDF document text
    • http://verifybadgesbusiness.com/835622571702iykl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fe534ff7876e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5fc68683778fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 5192 bytes
SHA-256: 0f8a3722484e1b802e2ad0e0b9228a88893e2672670e1791094f1834620f9559
font_01_sfnt_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 11524 bytes
SHA-256: 300ff10086a61c68521d450f967f2d9aa32d0117b4bbab6ff6fb2704066422b0
font_03_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 16148 bytes
SHA-256: 2de33a50f9637b18087128240845e76ee1a43165262b25ae5a7290543e036588

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