Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9fe8b43dc7c6a0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-28 17:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 222e7f617f6889507d0b555206318dfc SHA-1: 675d3ab854945f2c7a05e54a089b0f08058a582f SHA-256: 7e9fe8b43dc7c6a02ed5ebfffc07a89ad4fe1de1692d0083eaff1d4742e8c4c4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'Mumbai map pdf', likely intended to direct users to the malicious URLs for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=mumbai+map+pdf PDF link annotation
    • http://zunololanuxigu.sportsontheweb.net/60623541757.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/1092948.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/prefix_and_suffix_worksheets_with_answers_doc.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/gevoxuw.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/8984206.pdfIn PDF document text
    • http://manthoughtswebsite.website/why_water_heater_pilot_keeps_going_outgid7y.pdfIn PDF document text
    • http://peuer.xyz/mozejurufogafufrwomf.pdfIn PDF document text
    • http://outputqwvk.space/zagaworenipufomafaw6wkdf.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/novifamigot/how_much_does_a_psychoeducational_evaluation_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287f549a-9617-4651-8eba-2eb1151838c9/best_diet_plan_for_weight_gain_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/how_is_critical_thinking_related_to_media_and_information_literacy_brainly.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/komejepozukodere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec93c33e-0763-4467-af75-8d2a5b755618/pradeep_k_sinha_distributed_operating_systems_concepts_and_design_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/dibevemewurelaru.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/yamaha_rx-v475_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/acurite_01024_pro_weather_station_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5467b546-71f9-44dc-9d1e-72571c506657/what_is_the_role_of_a_health_care_social_worker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b3e24e-e788-4dc7-b811-257f9e9cd158/tabela_salario_policia_federal_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/dunkin_donuts_stock_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/addac782-9d96-4b32-b91b-76a37f2d1e2b/black_hawk_down_story_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/monster_girl_maker_2_pc_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/47578325562.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/world_football_game_apk.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_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 5028 bytes
SHA-256: 16fe7fb127ca0e524733ba66ef34293f5fc0ec41071458d3d5125c912f2360c7
font_01_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 11240 bytes
SHA-256: 1414040ea39a1d71f9396174cd1b473e251b66b6a6df4f534fac2b83fe7d4d55

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