Malicious PDF — malware analysis report

Static analysis result for SHA-256 2881ece333201d3f…

MALICIOUS

PDF

82.2 KB Created: 2021-03-23 06:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c077f40048986c05b03835abba0cdb7b SHA-1: a549d414749fe372183d3248110b108520eb6ae5 SHA-256: 2881ece333201d3f8b8dce26e14fd2dceb3b5f3e156b2fb45365a963a3557fe6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure, using a search query as bait. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, which can be used to create malicious PDFs. No scripts were extracted, but the presence of external URIs and the high confidence malicious verdict suggest it is designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/wix?keyword=dragoon+rotation+ffxiv+2020
    • https://cdn.sqhk.co/gojogefe/hbjeha7/dope_wallpaper_hd_iphone.pdf
    • http://zibodotuf.mygamesonline.org/99986026011.pdf
    • https://cdn-cms.f-static.net/uploads/4383794/normal_6033cf20afcfd.pdf
    • http://befelofote.iblogger.org/converting_length_worksheets_4th_grade.pdf
    • https://cdn.sqhk.co/pugirunosamo/a6ykih2/talking_dogs_around_campfire_commercial.pdf
    • https://cdn.sqhk.co/pinofizulag/gjGgiji/fumorugipokiretofufajoxa.pdf
    • https://static.s123-cdn-static.com/uploads/4456140/normal_5fcfa3d196531.pdf
    • http://zaparipajomigi.scienceontheweb.net/74600659990.pdf
    • http://kodutizaga.mywebcommunity.org/bonsai_tree_care.pdf
    • https://cdn.sqhk.co/sikudile/ghZHwTy/3246775412.pdf
    • https://static.s123-cdn-static.com/uploads/4456728/normal_5fceb20da73af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_1cfd153db54b495aa2859adffaca17ea.pdf?index=true
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_f84f8a79775440f9a54914feb853575e.pdf?index=true
    • http://belajuba.epizy.com/how_to_pass_texas_dps_written_test.pdf
    • http://vidilig.onlinewebshop.net/megobulitivova.pdf
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_219fb0541e5c452d910c2b28457d48db.pdf?index=true
    • http://ropajevunowijit.epizy.com/bihar_police_sub_inspector_question_paper.pdf
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_b89ca2ff2ff94940986a75735a6a580c.pdf?index=true
    • http://jegagasare.rf.gd/.pdf
    • http://wipivuvu.rf.gd/sims_4_update_november_2020_mods.pdf
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_89f59322384541218b07f508c544b0f9.pdf?index=true
    • http://bujijawuta.atwebpages.com/les_cerfs_volants_de_kaboul_livre.pdf
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_c42493be10174f4495b02ea91b58c5d2.pdf?index=true
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_ee23bb6490d5403881ed06ba76c86f65.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e7.bin
e6e5da07c109c3037e2da517dcd2b5635e3d3b99deee7399ac4050d8b0480895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 4796 bytes
font_01_sfnt_off00010940.bin
7ee7446c47664a20a776c6d1d3f9da7fe277d728c863528639e8e8003f7b4f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 10800 bytes
font_02_sfnt_off00012e18.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E18 4324 bytes

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