Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f3b7b7ea9bad01…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 17:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcd0ae48ad4822f4456fd656bc305b3c SHA-1: d153410370bf1dc2db6623ac4040cecc0807aad8 SHA-256: d8f3b7b7ea9bad014017a2300f1bc0c91b3ffdf716f03acf27623ece93c63ffe
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 URI pointing to a suspicious domain, which is likely the primary objective of the document. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, consistent with a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=mole+worksheet+%25231+moles+particles+answer+key
    • http://mebelrostov.ru/90297442034u1o4l.pdf
    • http://zowiramizowomo.iblogger.org/danby_portable_air_conditioner_manual_dpac8kdb.pdf
    • https://worivoka.weebly.com/uploads/1/3/4/5/134588103/razaxopabuwugur.pdf
    • https://vidigesiwixir.weebly.com/uploads/1/3/3/9/133997627/9103806.pdf
    • http://dujaliz.iblogger.org/will_brain_fog_go_away_after_covid.pdf
    • https://vomukefepa.weebly.com/uploads/1/3/1/8/131872153/6609031.pdf
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/fa0f904d79195b9.pdf
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/mugudefatasubunav.pdf
    • http://xigosilefonaboj.iblogger.org/gogikowa.pdf
    • http://zowuzigokov.22web.org/surface_area_of_cube_and_cuboid_worksheet.pdf
    • http://lngcliente.com/dell_r710_max_drive_sizek0eiu.pdf
    • https://palivifu.weebly.com/uploads/1/3/3/9/133986562/bijigovuxoxub.pdf
    • http://kismykeitio.best/smd_components_footprint1q1l8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lazazowoj.epizy.com/carbon_footprint_assessment.pdf
    • http://misukejijixuke.epizy.com/97220700989.pdf
    • http://lidufaz.epizy.com/m_audio_code_49_setup.pdf
    • https://uploads.strikinglycdn.com/files/eb764a47-0234-46cf-90d0-0213465ad88a/how_to_put_vinyl_decal_on_window.pdf
    • https://uploads.strikinglycdn.com/files/50bc05fb-fdfd-422f-a81f-58b1f04e7ce2/divina_comedia_los_circulos_del_infierno.pdf
    • http://ditajizuru.rf.gd/79645355753.pdf
    • http://puviseb.epizy.com/bissell_powerforce_powerbrush_pet_manual.pdf
    • https://uploads.strikinglycdn.com/files/750a9289-77bb-4a88-8635-896195729562/lijesetinutajawar.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_off0000ef1c.bin
af8d875feb98af5bc04b6f338af3ef32e5acd04bff89d1fed397ab7a39ddca3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 4724 bytes
font_01_sfnt_off0000ff43.bin
59553d620230e5a33ee5f2f8319382410dd6c1b2d6aec7d56497bbe8c346d96d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF43 10304 bytes