Malicious PDF — malware analysis report

Static analysis result for SHA-256 62709dccac7f69e6…

MALICIOUS

PDF

81.3 KB Created: 2021-03-25 09:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4acda39cb3e56fb443e4c5860ef04c46 SHA-1: edc4f7ded13d8909742dc688700f0e79469bb3ff SHA-256: 62709dccac7f69e682888bc31717aab3704c9e673dd7fce07ed332bbe0b96e7b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The embedded URLs likely serve as entry points to further malicious content or phishing pages.

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://dugedepap.ru/strik?utm_term=review+buku+contact+carl+sagan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482230/normal_603584632bc4f.pdfIn PDF document text
    • https://ritulamilogukez.weebly.com/uploads/1/3/4/8/134864073/xamowuxinezotagiduze.pdfIn PDF document text
    • http://cloudmarket.website/5414207754129b26.pdfIn PDF document text
    • https://fuxuwalanad.weebly.com/uploads/1/3/4/4/134487417/087d71df5.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/zemovedejiluxitabelo.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/hejc3ic/mevuvejob.pdfIn PDF document text
    • http://daniele.store/refekuzivphrf8.pdfIn PDF document text
    • https://kekidebas.weebly.com/uploads/1/3/4/6/134633427/wedokime.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390055/normal_6004301b60283.pdfIn PDF document text
    • http://kefets.xyz/how_to_have_a_healthy_meal_planb2m7u.pdfIn PDF document text
    • https://taxupati.weebly.com/uploads/1/3/4/8/134891344/f680edc4c44.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/91906554961.pdfIn PDF document text
    • https://pojewesam.weebly.com/uploads/1/3/1/4/131410485/wawefol-kuzusiwi-fejarawexatisuf.pdfIn PDF document text
    • https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/3496230.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/twilight_2008_full_movie_in_hindi_part_1_download_720p.pdfIn PDF document text
    • http://wgathering.org/wegilegomalatumulis.pdfIn PDF document text
    • https://tirotoperanape.weebly.com/uploads/1/3/4/3/134315774/narotajite.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/gd1jiid/serinizopilebus.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_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 5332 bytes
SHA-256: 175c08a7c82afa59ed63fb3f5cabda878e8db8571d750295b6ded09c76d3368c
font_01_sfnt_off00011400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11400 10728 bytes
SHA-256: 052b4ec394ef4200ae8170016e421937946fd4471c61eb72d2116825f2090bc5

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