Malicious PDF — malware analysis report

Static analysis result for SHA-256 8480af70e99e3d25…

MALICIOUS

PDF

88.9 KB Created: 2021-03-15 12:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac99d19cec7a1034ed465a200f90f73b SHA-1: 70254d6d6a86ffee7bce85088111f84081917648 SHA-256: 8480af70e99e3d25681a6e42f8143ea65b06144988339db3a9585e8fde408047
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 that mimics a search result, likely intended to trick the user into visiting a malicious website. No scripts were extracted, but the presence of an external URI and the phishing classification strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=australasian+philosophy+family+tree
    • http://nipokaxa.getenjoyment.net/arduino_programing_language.pdf
    • https://cdn-cms.f-static.net/uploads/4481156/normal_60240e1bb8292.pdf
    • http://fabujisaw.mygamesonline.org/nike_air_force_1_pixel_gold_chain_white.pdf
    • https://cdn-cms.f-static.net/uploads/4392660/normal_601e57ecdf279.pdf
    • http://jevijuratovate.22web.org/synonyms_and_antonyms_worksheet_year_5.pdf
    • http://tujozavido.66ghz.com/expenses_by_vendor_detail_report_quickbooks_desktop.pdf
    • http://noriwisisun.iblogger.org/unicorn_head_colouring_sheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://notijukigexu.rf.gd/palig.pdf
    • https://s3.amazonaws.com/rovikibixu/disney_world_crowd_calendar_today.pdf
    • https://uploads.strikinglycdn.com/files/46cde758-dc40-44fc-af68-428d5b19b95a/ruvazujukebafin.pdf
    • https://uploads.strikinglycdn.com/files/44ef54b7-ae22-4cb9-9077-e925c3028584/how_to_replace_intellichlor_ic40.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/chutti_tv_tamil_movies.pdf
    • https://uploads.strikinglycdn.com/files/cbccad56-86ee-4f07-87e1-990d0767b539/24396872053.pdf
    • https://uploads.strikinglycdn.com/files/f870caeb-3988-4038-9297-510761632b1e/how_much_is_disney_california_adventure.pdf
    • https://uploads.strikinglycdn.com/files/d0e2f3bf-339f-4f7d-b7f0-aab2161bfe36/toner_do_drukarki_hp_laserjet_2100.pdf
    • https://uploads.strikinglycdn.com/files/09078fb4-0271-4642-93a9-67d786e9daa2/kutawerutexumododew.pdf
    • https://uploads.strikinglycdn.com/files/24f4e854-2ded-494f-bf9c-1901dcafc85d/activate_windows_10_pro_for_free_2020.pdf
    • https://s3.amazonaws.com/tevomenil/zokalesur.pdf
    • https://uploads.strikinglycdn.com/files/5d13a4b2-a1ff-4e84-97a2-5c8ca1ec8d22/32417657323.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_off00011f25.bin
3bc432a2acb46c1092567d39b909c35459484322ffc6aec47ee9340eec7b5d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 5232 bytes
font_01_sfnt_off000130d2.bin
dddb2b97d13e1745f39c717d1041a51f260d19c9e3ee0879f8a67a5048c8ee97
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D2 10964 bytes