Malicious PDF — malware analysis report

Static analysis result for SHA-256 d517009c871ee488…

MALICIOUS

PDF

79.3 KB Created: 2021-03-22 18:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 494b03e41a7a06faa6a50cdfc6e8b62a SHA-1: 990da72487d7f0074ff18f5ed57ce0741d9990eb SHA-256: d517009c871ee4887c2b6853afacb767410f192a5e7679d5b8d97a4b66fe1359
126 Risk Score

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 0.9998

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 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://fokemale.ru/award?keyword=icao+annex+13+10th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/sadudolamom/2khehhH/indycar_vs_f1_top_speed.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/what_is_social_inequality_simple_definition.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/83278127655.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/8752796472.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/fm_bmp_to_free.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/td_corrig_atomistique_s1.pdfIn PDF document text
    • http://sungo1.space/beat_racer_soundtrack89yoy.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/digitech_gnx3_review.pdfIn PDF document text
    • http://siondez.ru/mozipawotejal30lc5.pdfIn PDF document text
    • http://eurofamily.pro/neworemixewenujaneniduasjr3.pdfIn PDF document text
    • http://megiloreb.mypressonline.com/16679629470.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/LcEqTje/tomijarufewe.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/kopajuxagorigizeka.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/nhhtpRT/11543632268.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/sihibhe/lidodegolukemedu.pdfIn PDF document text
    • http://roskycnmx.com/rorimijukevugiwakurik.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/gidpicX/mastoiditis_x_ray_report.pdfIn PDF document text
    • http://my-favshoph.online/what_are_green_bonds_used_for70mtu.pdfIn PDF document text
    • http://storeplus.info/transformation_du_plan_exercices_corrigs_3medb7od.pdfIn PDF document text
    • http://sollabs.xyz/60996253424zdvwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 5300 bytes
SHA-256: 0bb38fa32c011e7970e5541174ceb8f0563342acaef60c832dc17e98ccce1553
font_01_sfnt_off00010bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 10656 bytes
SHA-256: 62e1b1a290309a2d4e72c5a9f86ae61e82154857a3f6785f940247da06c1c4a7

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