Malicious PDF — malware analysis report

Static analysis result for SHA-256 381b418eb40b20b2…

MALICIOUS

PDF

205.5 KB Created: 2021-01-19 18:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b6fe94da303c6887c5f40f628931b4f4 SHA-1: 20a2c7b7fa90415f3ca325e387617d04d21edd9c SHA-256: 381b418eb40b20b28c873c099dcdaa7fe6398b4d3d8a5a4f6862c374028e296a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic detecting it as Pdf.Phishing.Trojan. An external URI pointing to 'baarspo.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and external URL indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://baarspo.ru/123?utm_term=age+of+consent+nebraska+2018 PDF link annotation
    • https://cdn.sqhk.co/kewudomavave/jgfe53U/38230177938.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/hbfji9Y/off_road_rally_7_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/ldHheqv/free_wifi_booster_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/hevxchD/out_of_the_loop_idiom_origin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezetega/78752231854.pdfIn PDF document text
    • http://renedutej.rf.gd/tidovilewazajule.pdfIn PDF document text
    • http://bimivopi.epizy.com/fokolorenopevate.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/fatutadareforirosapuxozux.pdfIn PDF document text
    • http://morufigalolo.rf.gd/31963987566.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/cassava_planting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/bfads._net_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/zidejebokavoror.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/forky_pumpkin_carving_templates.pdfIn PDF document text
    • http://soxalisaxofaba.epizy.com/can_t_chrome_extensions_network_error.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/parliament_uk_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/educational_institute_website_html_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/dabufala.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/judenunimifewonetube.pdfIn PDF document text
    • http://purevaxa.epizy.com/bsl_v4_shader_1._8.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/archicad_23_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/wefawobuditosum.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB08 5732 bytes
SHA-256: 1a766ecd4ec67c08f379e28d1334ec14bf6376b66d05f2ef723649fd2c31dcf1
font_01_sfnt_off0002feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEB2 11984 bytes
SHA-256: 117b4035d354a6d05acbc9705431a7939b43ac5a4eca387058c3dbe50c1e8596

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