Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d09d7368dda1ef…

MALICIOUS

PDF

81.5 KB Created: 2020-11-28 18:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f8b9e1b28379234357219cbf9b20609f SHA-1: 20919c53b655c6dd5b042b7b8f9cd2eb2dedf4cb SHA-256: d8d09d7368dda1eff6fbee91e4d205c9c98b457c216ef71fd00b7c5e7c7bb4aa
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://traffine.ru/strik?utm_term=watch+series+online+sites+free PDF link annotation
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/gikenot_fomokuju_misepeba_guzaxe.pdfIn PDF document text
    • https://lusezatakobav.weebly.com/uploads/1/3/4/3/134352635/wufavuvukuvev.pdfIn PDF document text
    • https://dudixojazimonam.weebly.com/uploads/1/3/4/6/134638097/bojufujowaz.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/5308673.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/8090702.pdfIn PDF document text
    • https://susevire.weebly.com/uploads/1/3/4/8/134885610/zojavumibono.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/vosisavelif_dopibemebebe_romoliwavofuz.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/dexadojovigekaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5fa73d75a3a05.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/a3c4da92-6a88-4c74-86d3-911ee226b855/plant_paradox_enhancement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f811830b-6ac5-4207-bee3-6a6ac0bb3a6d/mindsight_daniel_siegel_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/givakok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098b3f62-45ef-4e63-8439-17349e601860/fomonomelogek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d68727-87d7-4473-b04f-b5181af448e0/fexaguxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/where_things_come_back_plot.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 4980 bytes
SHA-256: 3aaa80cc42714ec11674b698267a83111a0653fa1be3c35d4bfad8ddc3fdcdef
font_01_sfnt_off0000fecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECD 10772 bytes
SHA-256: 4f8710803634bc90a824bf4e7d8fd7dd0a3a21ded1dce4c48ed818c77574ee43
font_02_sfnt_off00012392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12392 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3

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