Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a37654e66d037a…

MALICIOUS

PDF

77.2 KB Created: 2021-01-19 18:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: da50f1ab2a8f2a729c6a0359a9bf4aa1 SHA-1: eec2a534946f6d4887237d651c77af5e93824944 SHA-256: b7a37654e66d037ab12ee7b5b3be918419f7e2579ea0ac6b186519ede963ba9d
96 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 an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'social problems examples' and references 'wkhtmltopdf', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=social+problems+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5ff3062117957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_5fb8c9995084a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5feb3b618868c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_5fdc15262659a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5fc795ef2e497.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/79636165573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443329/normal_5ffc5a3248114.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/O5jgjds/shooting_zombies_in_dallas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_6000d6ea6a4e1.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/ijiijGb/uber_eats_local_food_delivery_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/PiiPDhf/86441873029.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/cjgHAge/51684073803.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486534/normal_5fee10ef2c33e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/boduxatavepe/quadratic_simultaneous_equations_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/ibm_showcase_9_query_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/gonev.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/chrome_lastpass_plugin.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/munadupujix.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/newer_antiretroviral_drugs.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 4992 bytes
SHA-256: 71e6a89e8287e030f006ce29c0f8f69d70779cb99374b7a6a1eb76b830725e6e
font_01_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 11012 bytes
SHA-256: 45631469e038671da403c91c57e35071c6f1fa9fde99d306d8b6975fe887667d
font_02_sfnt_off00011988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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