Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78ee3246d529057…

MALICIOUS

PDF

71.1 KB Created: 2021-02-18 12:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 2825835d1660cb7b3022407f57291fa4 SHA-1: d3bd55f69bd2f8c1db166ef61448143cfb4dab40 SHA-256: f78ee3246d529057fa187341417d26c2b432120c86df7f52d621cdf76086edb7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'Kenmore seal n save manual', aiming to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://maypoin.ru/wix?keyword=kenmore+seal+n+save+manual PDF link annotation
    • https://cdn.sqhk.co/gedodupem/jgspgcK/recette_sandwich_mou_belge.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/vogibajaleti.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/e560f.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/7EXjkbN/accounting_bookkeeping_invoice_expense_inventory.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/jibgfH2/wivedijezuremezu.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/iibQCso/ballroom_dancing_songs_list.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/hgibiid/pelavevug.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/zorivabakizilaziwaza.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/504efa3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mcat_organic_chemistry_reactions_flashcards.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/19986486078.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/tozewumevutagafikarujane.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/samsung_android_phone_4000.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/5039365442.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/6475245620.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/kindergarten_math_worksheets_halloween.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/game_minecraft_gratis_untuk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/70174856090.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/vovosamemokosoreju.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/wallpaper_naruto_shippuden_for_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 4860 bytes
SHA-256: bcb058ec46722d99a7a55f6446506d0dd200e76dddc69dca355694f8ec41c24b
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 10228 bytes
SHA-256: 311e659ac0e1a577e5a5cae1c44c33d90fe2bb4864a0870c646a5bf32e850c11

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