Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8216b57639a7b4a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-23 01:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6ac30d0f9c3f93da70b0a25193e1469 SHA-1: 995a52fa9845ac2c86611d66ad102807073c7f7f SHA-256: d8216b57639a7b4a2a0290f4bd760187f8837aeee2a185d811551cc83e587f1e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/aws?utm_term=is+ccna+still+relevant+2021 PDF link annotation
    • https://cdn.sqhk.co/rapovixovuti/giojfhh/jixiwatagezadexopabe.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/texinulexofozulad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447093/normal_600513eb2f17e.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/PcjdWjg/ted_talks_meaning_in_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60359d3d6306a.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/26658583831.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/y2gcWg2/five_nights_at_freddy_s_2_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/jcjjX1h/penajuzefinilamam.pdfIn PDF document text
    • https://cdn.sqhk.co/vabolepibe/jgD7JLz/42229557589.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/hhjjWvS/lip_liner_and_lipstick_duo.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/general_equilibrium_in_economics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fe991fcc90bb.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/jeJehHG/baby_gap_girl_jacket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_6014eb2be28da.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/afRgeTv/infective_endocarditis_symptoms_and_signs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d2b6b8767.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/kibavutibeved/befotedexazirugibijisiwu.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/86720556816.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/zafibatarojap.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/measure_what_matters_john_doerr_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/wondershare_for_windows_7.pdfIn PDF document text
    • http://zilisidojaze.myartsonline.com/scanned_to_word_converter_freeware_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/bopitexomewagegibat.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/blue_colour_nature_images.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/beziwabokeloniwofux.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_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 5116 bytes
SHA-256: c4930946a1f03197b9ff66a7635ca24d655c41f120eef41c6cee885d0b16957f
font_01_sfnt_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 11512 bytes
SHA-256: 9c0eeb09d3f0aca79c839cc4fd3d1d93bc3309620c923b2a1760cccd57095197

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