Malicious PDF — malware analysis report

Static analysis result for SHA-256 582ed3731d156ea4…

MALICIOUS

PDF

79.3 KB Created: 2021-04-03 14:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d3a7c06dd512987904030710be0addc SHA-1: 7d6274f2f5a012709196e0cf123339905f359142 SHA-256: 582ed3731d156ea44b955fabc00808f7b4ec37ade8f5159d518b7d61f24f199c
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and Trojan activity. It contains an embedded URI pointing to a URL that appears to be a lure for downloading an APK, likely related to WhatsApp Plus. The document body, though heavily obfuscated, contains references to downloading APKs, reinforcing the phishing lure.

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://xezojetit.ru/wix?keyword=descargar+apk+de+whatsapp+plus+2020
    • http://visodesux.iblogger.org/aviary_app_apk.pdf
    • https://cdn.sqhk.co/lijedubejop/dibVgih/29628484396.pdf
    • https://cdn.sqhk.co/fixakozumad/hfhjTib/rukakutomog.pdf
    • https://cdn.sqhk.co/kanemili/jjedes2/real_football_fever_2018.pdf
    • https://cdn.sqhk.co/pafevola/idgftii/nvidia_shield_4k_hdr_gaming.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4fe1f309-d995-496e-83f2-9ec323164573/zenutemejipus.pdf
    • https://uploads.strikinglycdn.com/files/6e8e5211-11c5-4c46-a87b-df905da723e1/98521019918.pdf
    • https://s3.amazonaws.com/siwixomudit/11513923587.pdf
    • http://rugeritubaduw.epizy.com/vande_mataram_tamil_hd_video_song.pdf
    • https://uploads.strikinglycdn.com/files/e5cd6171-fc1a-4e96-a202-f92be66c408d/zuwizifefide.pdf
    • https://s3.amazonaws.com/gomaxod/35662223500.pdf
    • https://uploads.strikinglycdn.com/files/fe174e10-d7f9-483d-9861-14a9df974855/14827686306.pdf
    • https://uploads.strikinglycdn.com/files/8c3d121d-0759-4850-b0f8-ff7fda60e63c/jovegaxinovobukipijafer.pdf
    • https://uploads.strikinglycdn.com/files/77570ce4-b1d1-4190-8307-a9494eebac11/9410815949.pdf
    • https://uploads.strikinglycdn.com/files/3d3c92bc-e425-4de0-acab-b47754d355d7/hoover_windtunnel_vacuum_replacement_parts.pdf
    • https://s3.amazonaws.com/wozowuledij/argentinos_juniors_fc_form.pdf
    • https://s3.amazonaws.com/zijivevip/49959661566.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_off0000f48d.bin
448f85a73bfff001848e27babbe2143335bdc26bf9e4cae1731b4287cd46bca8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 5764 bytes
font_01_sfnt_off0001084a.bin
7098a9de33d4941272fe06cdb9ad4638dc6fc9ffe3e481ee3ba3ac4da9104618
pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 11880 bytes