Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d2cba5860569ec…

MALICIOUS

PDF

70.9 KB Created: 2021-04-04 23:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa9a51ba8e1ffc7201391a79286ece5 SHA-1: ba96b306c60447a8f7a049fd0d1e5ec7891471bc SHA-256: 64d2cba5860569ecc09f080b5f4d24a18a87434b9ca2fb9db5aba47445db4ca4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which are likely part of a link farm designed to obscure malicious intent. One of the extracted URLs, https://ponafet.ru/wix?keyword=white+linen+perfume+3+oz, appears to be a lure for users interested in perfume, potentially leading to phishing or malware. The presence of PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a coordinated effort for SEO manipulation or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/wix?keyword=white+linen+perfume+3+oz
    • https://baliwiwun.weebly.com/uploads/1/3/1/3/131380001/bexejosopodof.pdf
    • http://kopogaxepaku.sportsontheweb.net/nc_drivers_ed_handbook_2019.pdf
    • https://zetakopazo.weebly.com/uploads/1/3/5/3/135351561/juseloperarex.pdf
    • http://rowexusaje.mypressonline.com/cardiovascular_pharmacology_concepts.pdf
    • https://zodazapel.weebly.com/uploads/1/3/4/5/134511258/cb9ad.pdf
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/zumerasegujonu_pezuzelulexiva_pofudonoz.pdf
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/vixodojupofunabofuri.pdf
    • http://winovigamaj.mygamesonline.org/36557706482.pdf
    • https://zevuvizaxetu.weebly.com/uploads/1/3/4/8/134887967/katubejavavi-pirekakise-xerip-niwezixe.pdf
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/nuzavulamuzorot_toberogimu_gipogisare.pdf
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/796d901d8e.pdf
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/mekoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/potamotaz/givobomidiboropo.pdf
    • https://s3.amazonaws.com/sifawekujiki/difference_between_anthropology_and_sociology.pdf
    • http://pawepeg.atwebpages.com/sibap.pdf
    • https://s3.amazonaws.com/bitajemisajoz/tippmann_a5_stock_barrel_bore_size.pdf
    • https://s3.amazonaws.com/zoluwivebiro/can_you_play_games_on_chromebook.pdf
    • http://kuwitabetegipo.myartsonline.com/didozevaxibuvisokokek.pdf
    • https://s3.amazonaws.com/migivewuwe/what_things_are_illegal_in_texas.pdf
    • https://s3.amazonaws.com/zalomi/29567306884.pdf
    • https://s3.amazonaws.com/jutenojamega/forajusinofapikujawov.pdf
    • https://s3.amazonaws.com/fapaga/pijunise.pdf
    • https://s3.amazonaws.com/votubukaxogilix/email_feedback_form_template.pdf
    • https://s3.amazonaws.com/samopakamefap/11071936827.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_off0000d7e4.bin
4b776b5e251ea9b8f2c48f90dac1e677c361ee9452eccb9459f9bd18197649cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 4980 bytes
font_01_sfnt_off0000e8c7.bin
b9dd6342f13f92bb60ae5a1ed2e494807c4fed621975fbf2600db318b3fb151f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 10996 bytes

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