Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b5e8add1692d59…

MALICIOUS

PDF

125.5 KB Created: 2021-03-29 09:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a96dd2576f25f335e72196ae150653e SHA-1: 2a3f964689534753621da853605a67a6f708da12 SHA-256: 85b5e8add1692d59627d18450609019904ca45311e44fbeb37e0639b48978686
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a domain associated with malicious activity, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are common in phishing campaigns.

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://vilenefex.ru/strik?utm_term=viper+alarm+3100+wiring+diagram
    • https://cdn-cms.f-static.net/uploads/4385436/normal_601469b10c792.pdf
    • https://cdn-cms.f-static.net/uploads/4470681/normal_6011f04d5d71c.pdf
    • http://tehnikator.ru/dell_colour_laser_printer_1320c_troubleshootingjkb9u.pdf
    • http://ruguwafe.scienceontheweb.net/what_are_all_the_keurig_models.pdf
    • http://hookup754.fun/6144883480965akf.pdf
    • https://cdn-cms.f-static.net/uploads/4365660/normal_604a54169d297.pdf
    • http://usechambre.xyz/877373323769zgxj.pdf
    • http://tepuragebu.iblogger.org/personal_biography_template.pdf
    • http://dipunag.getenjoyment.net/landslide_ukulele_chords.pdf
    • http://shop-you.xyz/telufcplnc.pdf
    • http://rubisteq.online/types_of_nonfiction_text_structuresjibv4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f8259cfd-08dd-475b-9446-b10bb12db8a5/8560730318.pdf
    • https://uploads.strikinglycdn.com/files/aa875bc5-1f78-41d6-ab58-ea4a9a6814f7/the_testaments_margaret_atwood_sparknotes.pdf
    • https://uploads.strikinglycdn.com/files/587b6be5-a723-4605-ac7d-b318c3d91e15/53648151108.pdf
    • https://uploads.strikinglycdn.com/files/1d19cc4c-8482-4cf4-9efa-f48375498e0e/87113752263.pdf
    • http://wofofuzumoju.rf.gd/83420019879.pdf
    • https://uploads.strikinglycdn.com/files/e67e4993-db9c-4259-be10-9072cd2c659e/61464209633.pdf
    • https://uploads.strikinglycdn.com/files/b32370aa-6627-42cf-8e3c-143c90a59282/what_is_urban_area_definition.pdf
    • http://rajamuviw.epizy.com/zerorakilejusob.pdf
    • https://uploads.strikinglycdn.com/files/3ff4571f-6d39-48aa-a122-8279090a4010/what_is_the_best_exercise_for_building_glutes.pdf
    • http://fomigidaxek.epizy.com/53586789865.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_off0001ae00.bin
df0c7d4aaa22b4bf0b3a2acca88be34ffcddbb2c339ac4c865c5307f86fa288b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE00 5516 bytes
font_01_sfnt_off0001c0c8.bin
a28684b8dc04464a608feebfa573067ba4e2b821303432804b976c70c0563bca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0C8 11660 bytes