Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5d9d6ff2bcfd2a…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 16:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84ac1366b1a7ff9b7f44debb77509fe3 SHA-1: 56c1f249f3c6925c0beee25e6f2257ad3db39e50 SHA-256: 7f5d9d6ff2bcfd2a91dfc6e3a450fb05a730edeea7d08793ce6f14b9c72c774a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it is designed to redirect users to malicious sites or download further payloads. The presence of PDF-specific heuristics and embedded URLs points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=atomic+model+theory+pdf
    • http://konadok.iblogger.org/28867844917.pdf
    • https://cdn.sqhk.co/xovikojux/bgfPgij/traffic_moto_bike_attack_race_3d.pdf
    • https://cdn.sqhk.co/xazewizol/zjexYop/3315843297.pdf
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5fc6642e5d2c2.pdf
    • https://cdn.sqhk.co/jorimalid/hgjjXP8/voice_tools_pitch_tone_volume.pdf
    • http://vofitoweba.22web.org/wamamififil.pdf
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5ff8022e46458.pdf
    • https://cdn-cms.f-static.net/uploads/4501383/normal_601438d557467.pdf
    • http://lupazul.mywebcommunity.org/pumutefadugejevoz.pdf
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fdb8ea92534d.pdf
    • http://viputixezererej.66ghz.com/christmas_carols_guitar_chords.pdf
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fcdace539f22.pdf
    • https://cdn.sqhk.co/powosinubuk/f1haEhd/fixed_asset_tracking_template_excel.pdf
    • https://static.s123-cdn-static.com/uploads/4366327/normal_5ffa912434413.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2218d3a9-1f51-4989-b634-eec56db1d90f/general_contractor_safety_policy.pdf
    • http://zagupijalixi.myartsonline.com/37975516634.pdf
    • https://uploads.strikinglycdn.com/files/a14e1bdd-2e24-4abe-9043-21bf164405d5/washington_post_covid_mutation.pdf
    • https://uploads.strikinglycdn.com/files/9b7586cf-a7e8-48a1-b1d5-9e53d526b4d6/m_audio_fast_track_usb_driver_windows_10_64_bit.pdf
    • http://wupubew.epizy.com/55847685345.pdf
    • https://uploads.strikinglycdn.com/files/f3230607-3f13-4116-be6b-984394846c73/39313276620.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_off000101e0.bin
c0c818065059eb544012124ff917cfe01dd9a6f2ca3326fa4ba0cd031f9cdd95
pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 5096 bytes
font_01_sfnt_off00011314.bin
9f804e62bf2afaa82aa694e456c75cfb3879985c83196aa8a21492f026726602
pdf-font-stream PDF embedded font (sfnt) at offset 0x11314 11344 bytes