Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a46ee601880eb…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 08:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bda503d5ef85c98569086fdd2aee1321 SHA-1: 575d33c9998bc31ae688313c0a2b706a53a5f401 SHA-256: 876a46ee601880eb33c6078313c03d9213a220d4b6374d387477360072593467
186 Risk Score

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 0.9991

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://botokaw.ru/wix?keyword=2006+volvo+s40+repair+manual+pdf PDF link annotation
    • http://phrensy.co/zotuxovagijavoznbexb.pdfIn PDF document text
    • https://wotutokope.weebly.com/uploads/1/3/5/3/135315373/pipupidibener_kapasur_danuzu_vututorifel.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/kemedama.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/b9cdb.pdfIn PDF document text
    • https://cdn.sqhk.co/sitosuduf/Dpgjghc/kaiser_permanente_phone_number.pdfIn PDF document text
    • http://qrettalq.online/material_science_jobs_in_south_africanjk0s.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/kubuwiguweb.pdfIn PDF document text
    • https://suterigegopos.weebly.com/uploads/1/3/2/6/132695321/7436101.pdfIn PDF document text
    • https://vejupurujiku.weebly.com/uploads/1/3/1/6/131606174/ae55742e7ff422.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/lofusof.pdfIn PDF document text
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/jejokelekenobif_sefazirixi_gumenowavim.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/rowotojafej.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/5273320.pdfIn PDF document text
    • https://suretazusidik.weebly.com/uploads/1/3/4/0/134012564/gukapewakefonaveku.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/ihBihib/battlefield_2_artillery_how_to_use.pdfIn PDF document text
    • http://uscovidcharts.com/fadiwakafipelebcl0gi.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/3702211.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/dafupuxifol.pdfIn PDF document text
    • http://liketsven.xyz/cas_298-07-7_sdsa6mil.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/429830.pdfIn PDF document text
    • https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/7f90f5386bfcf4a.pdfIn PDF document text
    • http://rezonansmusic.com/maraletirojuj3det2.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/amibiek/commander_mtg_2020_rules.pdfIn PDF document text
    • https://gukikaxut.weebly.com/uploads/1/3/0/7/130775725/mubupilozubexol.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_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 5668 bytes
SHA-256: 666e275b34cfacd1b35313c3549b13986897c74493f2cf9d811ac3055be3f54a
font_01_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 10596 bytes
SHA-256: 780b2fee8f5125cb8d892ca3a535c7c439eb4e6d8d14a4ba824f6c832026e3bb