Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1875e79c9a8c613…

MALICIOUS

PDF

72.7 KB Created: 2021-03-29 16:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f45a0a4bc0cdbbcc694edef75b4f76c9 SHA-1: 7bf68767288aebc1cf285da3e078e753be619757 SHA-256: b1875e79c9a8c613025622cb4247a3a0f402775254d4c93c42a7991c8c9e0085
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, with a high risk score. It contains an embedded URI pointing to 'bologen.ru', which is suspicious. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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://bologen.ru/strik?utm_term=dyson+cyclone+v10+animal+cordless+vacuum+cleaner
    • http://zemegazi.22web.org/purpose_driven_life_day_13.pdf
    • http://naverako.iblogger.org/after_chapitre_2_franais_complet.pdf
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5ffaceee01885.pdf
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fd0a27733c91.pdf
    • https://cdn-cms.f-static.net/uploads/4412588/normal_600b4a46a3f2c.pdf
    • http://wopedejani.iblogger.org/penanorerunubuduvisefo.pdf
    • http://winemewimivo.22web.org/how_to_make_a_birthday_card_and_print_for_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/142eda1c-f14a-4e06-97ec-9ebda397741b/79361523826.pdf
    • http://varoniwarovez.rf.gd/blueyonder_email_settings_android.pdf
    • https://s3.amazonaws.com/bejokazemur/67828313203.pdf
    • https://uploads.strikinglycdn.com/files/2fa30f48-868d-4223-a512-0696c3ad757e/50048942535.pdf
    • https://uploads.strikinglycdn.com/files/d68cb0dd-7162-43bd-aff5-824a0f513f13/how_long_does_it_take_to_charge_tough_solar_g_shock.pdf
    • https://uploads.strikinglycdn.com/files/b5cf4cdd-8b5d-4a14-8c1e-a7272b875c4d/gixatetizusini.pdf
    • http://vejikanoko.rf.gd/okonkwo_character_analysis_essay.pdf
    • http://bolunivagoxel.epizy.com/vuvosowusovowijejefik.pdf
    • https://s3.amazonaws.com/bawalidamovidud/adele_hello_lyric_video.pdf
    • https://s3.amazonaws.com/tutapaxi/65440226934.pdf
    • https://uploads.strikinglycdn.com/files/f19975bb-580a-425a-9cb9-9045b2ba5347/94337019486.pdf
    • https://uploads.strikinglycdn.com/files/42c9418a-0fbb-4d96-973d-7bfb8c2b9831/77691483187.pdf
    • http://mojogisi.epizy.com/cognitively_guided_instruction_advantages_and_disadvantages.pdf
    • http://luvoxijamubisur.rf.gd/volume_of_different_shapes.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_off0000dcf3.bin
37738a018444c4682eafad0813529d09dc6c9a67a3e909c8980d7a3dbb8b7226
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF3 5440 bytes
font_01_sfnt_off0000ef74.bin
29f09c57c9796bf191525d5e0515121c171574f53dce5a80c47fbb2b5f7406ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10544 bytes