Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4cd51566ac060f…

MALICIOUS

PDF

77.9 KB Created: 2021-03-09 01:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4475de7160bea875aa88f765d28a8d SHA-1: 71a7b345b1210701d2a701a5e7a16516999d3c2c SHA-256: 0b4cd51566ac060f9332604c2eabe8760de8454d52eca918dca8953e3fb85db4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site offering a 'negative consent letter template', likely a lure. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious domain for further exploitation.

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://resalured.ru/123?utm_term=negative+consent+letter+template
    • http://memowelubi.mygamesonline.org/rca_rc205_dual_alarm_clock_radio_with_red_led__dual_wake.pdf
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/6539399.pdf
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/9090519.pdf
    • http://dosijefa.mypressonline.com/alesis_dm6_drum_set.pdf
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/1264061.pdf
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/kijiwupaf.pdf
    • https://kekebamifibem.weebly.com/uploads/1/3/1/6/131606854/3610070.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_60078e1f890a8.pdf
    • https://static.s123-cdn-static.com/uploads/4473031/normal_6000928c81b40.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fofeguj/43750125512.pdf
    • https://uploads.strikinglycdn.com/files/edb1ae48-30f2-41f0-9aa5-2621a0fa16b4/40848005760.pdf
    • http://katuribadelu.rf.gd/86670771932.pdf
    • http://tagugatukosag.epizy.com/how_to_cite_references_in_apa_format.pdf
    • https://s3.amazonaws.com/gumagabu/bilawijimuzinikep.pdf
    • https://uploads.strikinglycdn.com/files/b0d19e3c-993c-4b54-aec5-601ba143ad23/the_singing_machine_white_microphone.pdf
    • https://s3.amazonaws.com/bagisi/what_to_study_for_real_estate_license.pdf
    • https://uploads.strikinglycdn.com/files/1ca2976d-d9e2-412a-b7ec-e8f91b28b60d/importancia_de_los_medios_de_comunicacion_en_una_empresa.pdf
    • https://uploads.strikinglycdn.com/files/58843613-8ae8-40b7-9303-03c3c84683e6/foundations_of_geopolitics_english.pdf
    • https://uploads.strikinglycdn.com/files/165fc564-385f-4207-a95e-3a7a2f4788c3/le_petit_prince_chapitre_15_analyse.pdf
    • http://bibibojusajol.rf.gd/torikoxezamagewafutu.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_off0000f35e.bin
2b57e971ea996cc7301ac622222b09821746e251013f1e1c75ec29f9e36005a3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 5280 bytes
font_01_sfnt_off00010550.bin
07b58120aee65693943696ebc92a0115e5bae2ce339e9dfe1636c484f31278ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 10796 bytes