Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d12ea44429bb2c…

MALICIOUS

PDF

96.6 KB Created: 2021-04-03 11:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60afd7fe13ffd8ef46b2c5a023c0956a SHA-1: e6d36933afb9d67782b2ade38610fd5f99e6bc4a SHA-256: f5d12ea44429bb2cf1bf6b5f287b1e717a4e9a5a87b7401642e69fdee8dbee8f
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the presence of numerous external URLs points towards an attempt to redirect users to malicious sites, potentially for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/123?utm_term=cleverbot+app+apk
    • https://cdn.sqhk.co/konarolikomu/Lrqgegg/westwing_home_living_wikipedia.pdf
    • https://cdn.sqhk.co/devurekon/gnLgegh/playground_stickers_apk.pdf
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/a87615d6369.pdf
    • http://lnstagram-office.com/proceso_de_cultivo_de_arroz_en_ecuadorwck3b.pdf
    • http://dvertsoff.ru/44187669271cyv0h.pdf
    • http://moneyindia.site/peter_eisenman_diagram_diaries_author1xt2o.pdf
    • https://cdn.sqhk.co/kadeposamo/Shh0gNO/44754294286.pdf
    • https://cdn.sqhk.co/vovewotutal/tZiagh7/vaxotike.pdf
    • http://antonioit.space/collar_x_malice_platinum_guidehav9z.pdf
    • http://bupro.asia/3018408095hzkxp.pdf
    • https://dapodufez.weebly.com/uploads/1/3/3/9/133997146/e7ab761fe1290af.pdf
    • http://esclub.info/research_methods_in_psychology_quizlet_final372hn.pdf
    • https://cdn.sqhk.co/jifigetuxu/ddvGckF/kezavosebavajivu.pdf
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/5850636.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dalava/what_kind_of_battery_does_a_car_remote_take.pdf
    • https://uploads.strikinglycdn.com/files/97e4558e-8a6e-48ad-958f-7c7b446a4fb7/sat_reading_and_writing_practice_book.pdf
    • https://s3.amazonaws.com/defipedibe/blockbusters_game_board_template.pdf
    • https://s3.amazonaws.com/fixararololu/deliberate_risk_assessment_worksheet_sep_2014.pdf
    • https://s3.amazonaws.com/bogijexu/tumuzozibimekuw.pdf
    • https://uploads.strikinglycdn.com/files/6dd238e2-9189-416f-b263-088efe37e37f/fidozemekovofefovo.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_off00011136.bin
70feb83c49b570b81cd78fa94a25c678ec64c4373c6e0c7010bd78809bdf8f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 4804 bytes
font_01_sfnt_off00012197.bin
1e0a685939074281b88bab134ac023aad61fb27f5f010f77c6d5d0a204ba17dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 7856 bytes
font_02_sfnt_off0001378d.bin
6226e69b613489cab90846759dd080747c32d4687f40d222ddfcecc49adc9ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1378D 11684 bytes
font_03_sfnt_off00015f3a.bin
084b6525a893e69d1bc92d5d56ed029cdb86f7dfb8a5b342fbb9bbd0cc07adc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F3A 16248 bytes

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