Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce50c2ab343608b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-26 08:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e82abd1df9ca33194b2a82357660a93 SHA-1: 117fd02e09a330009b7af8ee60b9c1c9e5e98208 SHA-256: 3ce50c2ab343608b8de7f664ac40cc9dfc06050fa9c0221febe2727df49e763c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://dafemum.ru/strik?utm_term=cuales+son+los+3+tipos+de+investigacion+cientifica PDF link annotation
    • https://cdn.sqhk.co/saguregifu/ftgh9if/free_christmas_wallpaper_for_android_tablet.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/mJ67jb5/9731542940.pdfIn PDF document text
    • https://cdn.sqhk.co/padezeda/ohbjbfl/19639451498.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/CLogd7f/block_craft_3d_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/wevosevob/iijYSje/jojapudobuwewagimese.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/ic6anhb/lobajumupubomufaxur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fcb696-39d8-4693-a333-bed22f47ec10/76220847930.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_f0ca259fd7694add8f3731aadb997c4d.pdf?index=trueIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_c834a98e3e03495981091c0f0ed0c295.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/97354826283.pdfIn PDF document text
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_2963a1ab429049da978b96974f0f18b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/93917344264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ecb4027-a825-429f-a47b-5d47ceb62451/what_do_monsters_signify_in_dreams.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/respironics_remstar_plus_m_series_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/fodewasukabafosoz.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/queen_of_shadows_tv_series_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/fapifi.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/self_certification_form_print.pdfIn PDF document text
    • https://2c0370cf-43ec-4dc9-8589-ec1e7793a70d.filesusr.com/ugd/404058_540c97228bea4d159671edab5c2f1102.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/nanufozebetafizagedisap.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_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 5356 bytes
SHA-256: eb918aa40ad9dc3cf6346bc5d762db42f21f734c221bcee2dee7d17e00fa251e
font_01_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 11968 bytes
SHA-256: 3f15a78d8ad634cbc75a1a1ffbb6b9a896ce6dbeb93fa8876a039fa067725398

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