Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b1f1151bb12d85…

MALICIOUS

PDF

79.7 KB Created: 2021-02-22 14:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c05825a87e6dc8fbe956f9c09f0d8b2 SHA-1: be55c46b5d24f7339f8ef7ee22be0aff27ff29cf SHA-256: 96b1f1151bb12d8525fb386e2ebf7470aaee74c6ba7d15976f3a4b98f26a3507
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to an essay example, aligning with phishing tactics.

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://jottigo.ru/strik?utm_term=dance+concert+critique+essay+example
    • https://lelamibi.weebly.com/uploads/1/3/0/7/130738841/xasejid.pdf
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fe2bc40b9ada.pdf
    • https://cdn.sqhk.co/rozesivotix/hejjhbi/glow_hockey_pc.pdf
    • https://cdn.sqhk.co/regavebike/CZY1Jgj/road_to_legend_delve_review.pdf
    • http://guitar.su/71317059423c4dbr.pdf
    • http://vovpomnim.ru/vagolutedonevalwlcb5.pdf
    • http://masalev.ru/700026272339ih98.pdf
    • https://cdn.sqhk.co/fogibadeku/ZVifdeM/amtrak_auto_train_motorcycle_cost.pdf
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/308c4638a5e.pdf
    • https://cdn-cms.f-static.net/uploads/4495558/normal_60316c4497f23.pdf
    • https://cdn.sqhk.co/dufolatik/fheyVIZ/blake_shelton_best_music_offline_ringtones.pdf
    • https://cdn-cms.f-static.net/uploads/4480414/normal_601ab0e98c27e.pdf
    • https://static.s123-cdn-static.com/uploads/4466398/normal_5ff8087b025cd.pdf
    • https://static.s123-cdn-static.com/uploads/4495999/normal_5fe55d81b58d3.pdf
    • https://xavitutasufeja.weebly.com/uploads/1/3/4/6/134669981/1a55d.pdf
    • https://cdn-cms.f-static.net/uploads/4393790/normal_60129d9a16bf2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tumitodutib.rf.gd/amplificador_de_instrumentacion_con_lm324.pdf
    • http://sewoxoxitif.rf.gd/babesivasigopoto.pdf
    • http://bixodog.rf.gd/grade_6_science_reading_comprehension_worksheets.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_off0000fb6d.bin
bfe21446a19e19cd614130240b147c1cfbaf06c8239d7c2550b19b0995cdf774
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6D 5376 bytes
font_01_sfnt_off00010db3.bin
26b97f01acff4e53e97e38caa2d2fb8c2fd70d4ffc7bf2b6e52ca1ef225c254a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 10500 bytes