Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf8da37c540681c…

MALICIOUS

PDF

77.0 KB Created: 2021-04-24 00:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d65db66231ad64cb483e3e02fe4e5d1 SHA-1: ec754fbd3eeb629472663a0b3340d188f2c960bd SHA-256: fcf8da37c540681c378ce5cf36494d2616c8a2112cfd79bdd9b616c5e825fe9d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to a suspicious domain 'xezojetit.ru'. This, combined with ClamAV and ML detections, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a search query, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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-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://xezojetit.ru/strik?utm_term=does+burger+king+have+all+day+breakfast
    • http://tedamowajowiw.22web.org/50807662456.pdf
    • http://diwejibazetar.iblogger.org/apocryphal_bible.pdf
    • http://pejagepelif.iblogger.org/74851091720.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/23358c56-5b9c-468e-8b5c-45eba3c097eb/zoom_cable_modem_3.0_series_1094_firmware_update.pdf
    • https://uploads.strikinglycdn.com/files/a61f8285-5bee-4fa4-b021-4eeec638fbbb/mabiruxizizuzetisipum.pdf
    • https://s3.amazonaws.com/bubeto/what_is_the_moral_of_the_story_hansel_and_gretel.pdf
    • https://uploads.strikinglycdn.com/files/13dcd92c-8917-44a9-afcb-827a1fb7df17/setovajaritotogifa.pdf
    • https://uploads.strikinglycdn.com/files/5282255b-cd59-41df-b206-6b7fd0e92929/troy-bilt_horse_tiller_parts_diagram.pdf
    • http://nawezurik.rf.gd/edgar_allan_poe_fall_of_the_house_of_usher.pdf
    • https://s3.amazonaws.com/loneminovu/asphalt_nitro_mod_apk_oyun_indir_club.pdf
    • http://vepisesilutez.epizy.com/jelodi.pdf
    • http://kimuwasozapuse.rf.gd/28577954102.pdf
    • https://uploads.strikinglycdn.com/files/a439a6b2-c2ef-429b-956c-f20aa8847394/35534963653.pdf
    • https://uploads.strikinglycdn.com/files/77a99b9b-a7e5-44c4-878f-32502ad83a78/heather_has_two_mommies_quotes.pdf
    • https://uploads.strikinglycdn.com/files/55168bb7-a6db-42b7-9836-3d12e9d1c255/15231307516.pdf
    • https://s3.amazonaws.com/fipijife/debt_snowball_sheet_printable.pdf
    • http://rirokisigutu.rf.gd/what_are_the_three_main_parts_of_the_first_amendment.pdf
    • https://s3.amazonaws.com/vatakefojunib/farem.pdf
    • http://lefanivewog.epizy.com/xeximibibitidutudevizam.pdf
    • https://uploads.strikinglycdn.com/files/b8640932-2b47-4f0d-b860-33d90bc91710/raxet.pdf
    • https://s3.amazonaws.com/wolina/how_to_get_music_on_ipod_nano_without_itunes.pdf
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_c031c041a28a4cbe90346defd2e3412d.pdf?index=true
    • http://xixujoteb.epizy.com/tagebopujujava.pdf
    • http://vunowobaxab.epizy.com/giduwom.pdf
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_83ac319771a249fcbc5fb4dc6d01791c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9c.bin
0d766c286a47e8fd0db55bbe2cc2c0346fc412ece445272ccbbf566d34963a03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 5536 bytes
font_01_sfnt_off0000fe77.bin
e8bfb45f31b8e4a72de8c0c1da435cb5289292d4b19d1a8ddbb7f6b13c2c19a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 11192 bytes

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