Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dae1f6294961d6b…

MALICIOUS

PDF

79.6 KB Created: 2021-04-15 04:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 240d02340b4e0ce1e7e1c4af04b4ce94 SHA-1: 97150eb279c965f5df2ea8cf072a21b00b8ce9e1 SHA-256: 8dae1f6294961d6ba299ed7e1f9ae5c11808bfc61a739b86e8a2d398da4585f7
186 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 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=what+does+service+advancetrac+mean+on+ford+f350 PDF link annotation
    • http://dilawiputonu.mypressonline.com/36077902681.pdfIn PDF document text
    • https://cdn.sqhk.co/lasozigur/fuhbxz6/kofopatidagopo.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/fagerhb/the_buzzer_sound.pdfIn PDF document text
    • http://meetlait.pro/votularuxebumodapakiwanol3f1x.pdfIn PDF document text
    • https://jibozugapizame.weebly.com/uploads/1/3/0/7/130775201/8ddbecbf.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/hjgi9je/blank_japanese_writing_practice_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/eSgisgf/civil_war_dead_photos_in_color.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/93752837055.pdfIn PDF document text
    • https://pedudevapo.weebly.com/uploads/1/3/4/7/134719514/9804628.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/mipalanazusamofiwedol.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/l_abcdaire_de_gilles_deleuze.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/hbifhdB/69699945962.pdfIn PDF document text
    • http://50offit.pro/dumitanuzavekezinifixi92lgg.pdfIn PDF document text
    • http://rimka.xyz/the_end_of_the_affair_1955_youtubentdy7.pdfIn PDF document text
    • https://todifalaseb.weebly.com/uploads/1/3/4/6/134691997/finewij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepusum.onlinewebshop.net/nupifojawivorob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd41bb8-d6d1-49e5-b469-6bd5c718ca61/are_track_snow_blowers_better.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ecc9513-753a-46c1-a00e-3b26fc2eb4f6/4677608232.pdfIn PDF document text
    • http://jinugiwi.atwebpages.com/tumapavarixumexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859236f2-341f-4b04-a10e-9cc6956b23e9/ice_breakers_mints_price_in_pakistan.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_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 5732 bytes
SHA-256: 731acd177501ac1d5a17d45a0f52ebe51574a5066e30856ec5d46b321037e413
font_01_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 11244 bytes
SHA-256: dad45c0c7d5aedd08195cb8aa9f99f6a100e1cd7eea176ca3edd190bad7ec25c

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