Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63bc87b1e10f609…

MALICIOUS

PDF

93.7 KB Created: 2021-03-23 01:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d96f60f64d57b46ef3d8d525e942733 SHA-1: bd237728f2d01e65219b671cf472d8e65d9717d1 SHA-256: c63bc87b1e10f609ebf94ff401ce450ca62ae44ae0d9551a9b32803409eadc0c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with the primary heuristic indicating a link farm designed to direct users to various resources. The document body, though partially corrupted, suggests a lure related to translation services. The presence of multiple external URIs and a high ML classifier score strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/aws?utm_term=traducir+del+espa%25C3%25B1ol+al+portugues+de+portugal
    • https://palelajasirele.weebly.com/uploads/1/3/5/3/135311742/3427896.pdf
    • https://zuwanefo.weebly.com/uploads/1/3/4/0/134040462/sigide.pdf
    • https://tizetenu.weebly.com/uploads/1/3/3/9/133999913/9157697.pdf
    • http://ridaxaki.mywebcommunity.org/guitar_chords_chart_printable.pdf
    • http://dafagaketa.sportsontheweb.net/24196991501.pdf
    • https://zawivipesanupi.weebly.com/uploads/1/3/4/7/134724715/080631.pdf
    • http://suvonenexazu.mywebcommunity.org/bacteriologa_veterinaria.pdf
    • http://nipobudagese.mypressonline.com/sijivisuraseduzibubimo.pdf
    • http://fidekeleko.medianewsonline.com/eaton_axial_piston_pump.pdf
    • https://fawimerena.weebly.com/uploads/1/3/4/6/134630635/kokosag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://karajifaderiwow.epizy.com/aashto_lrfd_2017_espaol.pdf
    • https://s3.amazonaws.com/bomifabipi/game_of_thrones_wiki_season_2_episode_5.pdf
    • https://s3.amazonaws.com/neviwove/mr_bean_movie_utorrent.pdf
    • https://s3.amazonaws.com/muxozuvalubi/jabumekorivuvajipim.pdf
    • https://s3.amazonaws.com/mefonevimimix/common_journalistic_reporting_practice.pdf
    • https://s3.amazonaws.com/moduluzuxikari/meaning_of_public_administration_in_telugu_language.pdf
    • https://s3.amazonaws.com/rezugekolaba/26707127527.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/xidibu.pdf
    • https://s3.amazonaws.com/xedewofuretujo/74985594096.pdf
    • https://s3.amazonaws.com/dalava/bestie_beauty_camera.pdf
    • http://wokezafuvix.epizy.com/wutip.pdf
    • https://s3.amazonaws.com/liwafo/8887120477.pdf
    • https://s3.amazonaws.com/fowikorejodi/49021864640.pdf
    • https://s3.amazonaws.com/bokexizometun/69846275446.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f6.bin
3368b843c722e83c4024ed6c77fc8a5c3212bd647cfe85422031d33cf990a063		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 8056 bytes
font_01_sfnt_off00010ec6.bin
7bf79416a4480a9060d9b0f05b92398163a63713bb2d9ee09f6b81b4f7855903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 5400 bytes
font_02_sfnt_off000120ed.bin
f30afcd8acaed41d4ed14aaa774da4c61df18c6ea3a5c3f0deee960bf38a4b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120ED 14500 bytes
font_03_sfnt_off00014d20.bin
35d219adf46fa8f44b151627029dd1544f4cbc90b7f93d0f74d883eb4b75845f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D20 17272 bytes

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