Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad29e57f092e3443…

MALICIOUS

PDF

80.4 KB Created: 2021-04-01 20:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6e696833e72cd44d66c791200f1e1bcf SHA-1: 172ef8608ac9d24e822b8e31674172f29f31ba8c SHA-256: ad29e57f092e3443bfbeec57cac94c9fa122ffdf6a8d1f166119b99586c4684f
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 0.9997

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://soxebez.ru/123?utm_term=chatrapathi+movie+songs PDF link annotation
    • http://kyukty68.xyz/211398752869pk9f.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/vegubojufamiguboro.pdfIn PDF document text
    • http://minuette.me/can_you_write_return_to_sender_on_fedexd2l3y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_6064aab410f8e.pdfIn PDF document text
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/f163bd30b18add3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5febeb7758650.pdfIn PDF document text
    • http://sneakerspapa.store/sri_lakshmi_narasimha_sahasranama_stotram_lyrics_in_tamiluwtit.pdfIn PDF document text
    • http://bukobaxaz.getenjoyment.net/52263610951.pdfIn PDF document text
    • http://tcerkovniekupola.space/rovanukepeketepipasmn8cp.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/zevena.pdfIn PDF document text
    • https://xefewovureku.weebly.com/uploads/1/3/4/2/134265706/5235261.pdfIn PDF document text
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/molefu.pdfIn PDF document text
    • http://mazafaka69pussy.online/shimano_ultegra_di2_6870_2x11sp_sti_shifter_set7oid9.pdfIn PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/seren_powufagazifuf_nidefax.pdfIn PDF document text
    • https://wevapagavum.weebly.com/uploads/1/3/4/3/134306171/4878074.pdfIn PDF document text
    • https://fuguweraxawu.weebly.com/uploads/1/3/4/6/134684603/4039584.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/tinajabizoreguf/bipebikogugumefosewub.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/65931067927.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/second_language_acquisition_theories_examples.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/garefexe.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/how_are_the_house_and_senate_organized_in_a_similar_manner.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_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 5164 bytes
SHA-256: 677c37dda8d8a1a58442da088be2973d8158fd5257e7ea37a61c824909f82397
font_01_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 11512 bytes
SHA-256: 36cb0c109de372bc915b0a461d715891e613237032842d88e7b5ef90c4c21658

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