Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe33dee6f8e771e1…

MALICIOUS

PDF

80.1 KB Created: 2021-04-06 06:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0bd642c41a37f9076c066552f41bb0 SHA-1: 289227ab591ab712422b68e16c2fd775aafcf420 SHA-256: fe33dee6f8e771e10d5f4c400e7f85004afc6bb057505d1791b9c997fb4e0d34
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The presence of external URIs and the overall detection profile suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=fe+reference+manual
    • http://lorenbayi.com/tic_tac_toe_python_deep_learningplid4.pdf
    • https://cdn.sqhk.co/tiviluluje/jigf11G/90693518942.pdf
    • http://yourlivehelp.com/snapping_turtle_habitat_facts02guo.pdf
    • http://prizinsta.info/speak_by_laurie_halse_anderson_questions7f73b.pdf
    • http://community-day.ru/charm_city_kings_full_movie_where_to_watch7q00u.pdf
    • https://cdn.sqhk.co/wogokodu/g2zvzjj/play_romance_of_the_three_kingdoms_2_online.pdf
    • https://cdn.sqhk.co/gaxomawelej/6Lig4gh/31561001914.pdf
    • http://zifufarox.getenjoyment.net/seismic_design_of_building_structures.pdf
    • https://static.s123-cdn-static.com/uploads/4421460/normal_5ffe83b345748.pdf
    • http://apsdd54gfv.xyz/how_to_set_up_arris_surfboard_sb6141yqddp.pdf
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5ff366e8399c6.pdf
    • https://cdn-cms.f-static.net/uploads/4365545/normal_605b8fefdee9e.pdf
    • http://alcexpress3.xyz/bogetulosedotilajemjckh.pdf
    • http://natfreshik.fun/89706718780kbr3c.pdf
    • http://demask.fun/17234876927fjkd6.pdf
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffd6792b8265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lufevexos.atwebpages.com/agriculture_problems_in_pakistan_2020.pdf
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_2c9d29ed6bed4122ae4b3ad85a4925f3.pdf?index=true
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_29bf9355199a415ba66e1087e9c32811.pdf?index=true
    • http://muvamubas.atwebpages.com/appareil_digestif.pdf
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_ac3ec5dbc2ee468ebed55bb125c3db8d.pdf?index=true
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_a13fdce709b94a13a9163e3626b78f5a.pdf?index=true
    • http://naxefugoxodikow.atwebpages.com/xuzawituzado.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_off0000f941.bin
157a8f2a9326cde696e09ace9458f10db30ec594736518a17ee6ddc626d2d7be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 4804 bytes
font_01_sfnt_off00010980.bin
4a0f56231ac79951f69eb5b4e75388fb63ba46fffb6c3b5ceceb29dd9e9885de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 12408 bytes

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