Malicious PDF — malware analysis report

Static analysis result for SHA-256 5955a0de4e7c715d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-15 09:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940f60317b4185400570b89f07fc8fbc SHA-1: 15a6a1b71c2fe803548dd89876672d2a4315fa92 SHA-256: 5955a0de4e7c715d6e10c5c1df8a95a9da9af30b55b73dccf5217cd3f0772f20
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. ClamAV and ML classifiers also flagged the file as malicious. The presence of embedded URLs suggests an attempt to redirect users to phishing or malware-hosting sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/123?utm_term=nice+guidelines+gestational+diabetes+levels
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/2631971.pdf
    • http://6gusevshop.website/cracked_apk_apps_freehhpbl.pdf
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/7b06c.pdf
    • http://white-x.fun/currency_trading_app_androidlc92l.pdf
    • https://rexaririwe.weebly.com/uploads/1/3/1/6/131637114/dodirinugiramidukoza.pdf
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/fapukezeguten.pdf
    • http://lofobidu.22web.org/cavalleria_rusticana_sheet_music.pdf
    • http://garant-ritual.online/79203677438x0r0u.pdf
    • http://boevoenlp.com/907721440951u8fx.pdf
    • http://all-gopro.com/loving_and_forgiving_lyricsccm1c.pdf
    • http://tryici.xyz/balu_mahi_full_movie_filmywappohlx.pdf
    • http://microdigitalmeter.xyz/ledovelenaxikigazujins87hr.pdf
    • http://bachanalytics.com/kixasariwimotivazetogakejj1g77.pdf
    • https://mosazipabefo.weebly.com/uploads/1/3/4/7/134735261/runivaradaz-wupikigetud-jedimolofotaji.pdf
    • http://3gusevshop.website/opel_cascada_technische_datengaplw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loneminovu/biology_book_10-_12.pdf
    • https://s3.amazonaws.com/pasutiz/diccionario_de_espaol_traducido_a_ingles.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/kevegenat.pdf
    • https://s3.amazonaws.com/sedowedi/movato.pdf
    • http://zinabukupomij.rf.gd/refinishing_kitchen_cabinets_cost.pdf
    • https://s3.amazonaws.com/risalenefazozo/charger_for_ipod_nano_3rd_generation.pdf
    • http://genenapukiral.epizy.com/84606957966.pdf
    • http://nopexuwub.rf.gd/mijatare.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_off0000f344.bin
addf2ea6d8413abde1a66fee8c2be7fb54b3e4f2526c42ccec1af3f742b895ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF344 5180 bytes
font_01_sfnt_off00010504.bin
b96c06a5f7ef1e9d514cfe051715d4b10465a1615f8f35e9efea8bd251b60108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 12208 bytes

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