Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3398f6e62b5f7eb…

MALICIOUS

PDF

77.5 KB Created: 2021-04-09 03:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 696f9f43a91b4c32bbaac1dda1c7a7fc SHA-1: c8ce083b1ad0d544b5a616e8ac681cd61fda6871 SHA-256: b3398f6e62b5f7eb2801acb9a94495d344ea35cc6e3b5668ea9a63e03134a164
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to design elements to entice clicks on the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=what+is+texture+in+design+elements
    • http://lasiwefomibew.sportsontheweb.net/national_antibiotic_guidelines_doh.pdf
    • http://uber-global.com/hague_convention_apostillef1xyq.pdf
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/lavad.pdf
    • https://kapalane.weebly.com/uploads/1/3/0/9/130968981/suzedaros.pdf
    • https://fenipedixov.weebly.com/uploads/1/3/5/3/135385823/kuvexivobobavedukes.pdf
    • http://rodina38.ru/rufuvivezifir8094e.pdf
    • https://labafapagitef.weebly.com/uploads/1/3/1/6/131637364/90935.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://nicechange.space/funny_orange_cat_memesan3r7.pdf
    • https://fawezodotemo.weebly.com/uploads/1/3/4/8/134871545/49b2127708a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ropupifalapoges.atwebpages.com/wopemim.pdf
    • https://uploads.strikinglycdn.com/files/f7d9834c-7188-4186-8939-f5e633b24c57/bilaz.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/74695603948.pdf
    • https://s3.amazonaws.com/laginekux/appropriate_age_to_read_the_little_prince.pdf
    • https://uploads.strikinglycdn.com/files/8b050058-3045-409b-92d9-a337583dd212/graco_duetsoothe_swing_instructions.pdf
    • https://uploads.strikinglycdn.com/files/dd412a15-c1f5-41d8-8468-7036bf5c806c/essentials_of_strategic_management_the_quest_for_competitive_advantage.pdf
    • http://gakamaxoluzes.atwebpages.com/xamur.pdf
    • https://uploads.strikinglycdn.com/files/2dc01530-8165-467f-8ee5-8bd20ea73134/lidadinivudarovejejelumu.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_off0000f0fb.bin
58c000689301c6dbaeb8c2a3b08644c70dae662aba9ead5835ece5f7967931bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FB 5320 bytes
font_01_sfnt_off000102f8.bin
067f40f25420819779c5040d5ece172281ae1e77cede5563f71cd2fdacc24909
pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 10884 bytes