Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b27ff97d7366c4…

MALICIOUS

PDF

71.0 KB Created: 2021-06-01 15:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 204b64dc9180650fec8da7ad59536842 SHA-1: 7d49d946a8731df8e98ab35e85b15c035260878c SHA-256: c4b27ff97d7366c4d25453a755be02fa913d449e2f699cc85ec3ef0216470554
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Assistir 50 tons de cinza legendado online gratis' (Watch 50 Shades of Grey subtitled online for free). It also contains an external URI pointing to a suspicious URL, which is likely the primary objective of this phishing document. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://huntic.ru/pbw?utm_term=assistir+50+tons+de+cinza+legendado+online+gratis
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5fd2e7c14fc0f.pdf
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5fcf44ebd2d6c.pdf
    • https://cdn-cms.f-static.net/uploads/4414357/normal_6011284b34187.pdf
    • https://cdn-cms.f-static.net/uploads/4383137/normal_602be3ae8fc1c.pdf
    • https://cdn-cms.f-static.net/uploads/4446017/normal_602e1d42b6837.pdf
    • https://cdn-cms.f-static.net/uploads/4455405/normal_60540aecaf053.pdf
    • https://cdn-cms.f-static.net/uploads/4467936/normal_604ac943bac5c.pdf
    • https://cdn-cms.f-static.net/uploads/4502817/normal_601298b83adf0.pdf
    • https://static.s123-cdn-static-d.com/uploads/4496204/normal_60b075cfd448e.pdf
    • https://cdn-cms.f-static.net/uploads/4409630/normal_600e02dfeb06c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dekokos.pbworks.com/w/file/fetch/144421026/brief_marketing_plan_example.pdf
    • http://ruwezebom.pbworks.com/f/how_do_i_turn_off_google_news_alerts.pdf
    • https://uploads.strikinglycdn.com/files/1838c94d-13a8-4329-a12c-3cd13aa157f5/lozemalumesidevubibagis.pdf
    • http://sizolasipape.pbworks.com/f/sezejejazesuxenusuwulax.pdf
    • http://ziduzobif.pbworks.com/w/file/fetch/144455631/how_to_get_unlimited_money_and_diamonds_in_gangstar_vegas.pdf
    • https://uploads.strikinglycdn.com/files/59ff77d9-499c-4cfb-b0ab-4c57c1cccc30/tabla_de_equivalencias_de_unidades_de_medida_de_temperatura.pdf
    • https://uploads.strikinglycdn.com/files/c68ec834-d013-4efd-8e5f-98b9c1a33385/elementary_the_price_of_admission_full_cast_and_crew.pdf
    • https://uploads.strikinglycdn.com/files/69c91ffe-d0cc-4c50-a703-836fa9da2798/axis_bank_online_test_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/23c2b65b-4156-4a94-b2d8-5c5bd245a155/what_are_some_features_of_expository_text.pdf
    • http://fodorafirig.pbworks.com/w/file/fetch/144446667/is_a_three_day_split_enough_workout.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_off0000d4b0.bin
02f128a1b02b9402c882e607e076a58f4994c3d8dd9640689a26a7d431fb8f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B0 5412 bytes
font_01_sfnt_off0000e738.bin
17424a6df875fc7922a041946736ec2c11d5875170bc58d2aff000ee98cf1ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE738 12048 bytes

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