Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e47e36d596f814d…

MALICIOUS

PDF

82.4 KB Created: 2020-11-14 22:46:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 361bf9774df929478fac8b5e046ad305 SHA-1: d48dca9d57cbe72781b29cb149e57a3b20facdaf SHA-256: 3e47e36d596f814dfcd44166696a2d8d8088ab5fe616387353392c4932d09a17
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://traffnew.ru/123?utm_term=motivation+and+emotion+psychology+summary', is suspicious and likely leads to malicious content or phishing pages. The document body is heavily obfuscated, but the presence of external links and the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=motivation+and+emotion+psychology+summary
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8d1956035df.pdf
    • https://cdn-cms.f-static.net/uploads/4418192/normal_5f9cbb389f5dc.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/b94e1a.pdf
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f8c977059a1d.pdf
    • https://cdn-cms.f-static.net/uploads/4428334/normal_5fa78e7d549e0.pdf
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8d0b5795b12.pdf
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/cb475bfa7e655.pdf
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f9d592874c80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ace8224-d86e-48d0-8940-80f93e6593a6/lejetejovafiwufazamulip.pdf
    • https://uploads.strikinglycdn.com/files/a3b62f07-4ed3-4c7e-ac4a-0d99a6d55520/cuidados_de_enfermeria_durante_el_pa.pdf
    • https://s3.amazonaws.com/bisegilupuf/heat_worksheet_4th_grade.pdf
    • https://uploads.strikinglycdn.com/files/94a33c56-ad0f-49d0-9922-b184b63646a1/povibufapesa.pdf
    • https://uploads.strikinglycdn.com/files/c97201ab-70b9-4343-834a-c7f2fa118745/gotaledaligubovinilenoza.pdf
    • 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_off000102c5.bin
94c775fcbd220d264f38c287ebd6a9a11541895d907f5c560697573de24c5886
pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 5656 bytes
font_01_sfnt_off000115f8.bin
ad6579a5feb8811475702db7f301af769c8703ec3ed4f76ce6988563c88c5c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 11800 bytes