Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba22a9aabb3c2a9c…

MALICIOUS

PDF

75.8 KB Created: 2021-05-15 02:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fa4b06a65c386694fd4c436041d532b6 SHA-1: 56fb669c12df3da1fbd96906058c47599c152781 SHA-256: ba22a9aabb3c2a9cbd84792e9434fe3d095d4786d116e5cceec340c3cddc950b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://baarspo.ru/strik?utm_term=how+to+find+the+sim+card+location PDF link annotation
    • https://cdn.sqhk.co/tirekidifole/RiggdCL/32552033655.pdfIn PDF document text
    • http://tisejamebip.sportsontheweb.net/70252703942.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/15552378296.pdfIn PDF document text
    • http://espacecmb.xyz/what_does_stairs_mean_in_your_dreamsqu5fx.pdfIn PDF document text
    • http://vutajazelige.medianewsonline.com/35878429775.pdfIn PDF document text
    • http://kevumoler.22web.org/10373546531.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/hjsgdjh/tumetorigekej.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/17907889197cy7bj.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/dDihige/sumesipipenugolewuxaxa.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/coronary_artery_disease_2020.pdfIn PDF document text
    • http://bakavorun.getenjoyment.net/download_auditing_book.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/dinebupiv.pdfIn PDF document text
    • http://gagarinski.su/800043928351hjpe.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/glossary_of_english_linguistic_terms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wovibojo.onlinewebshop.net/49779317751.pdfIn PDF document text
    • http://vekabun.myartsonline.com/press_agentry_model.pdfIn PDF document text
    • http://vedezanopade.epizy.com/investment_science_luenberger_espaol.pdfIn PDF document text
    • http://ganenimipoje.epizy.com/747096228.pdfIn PDF document text
    • http://duvodix.myartsonline.com/centrica_annual_report_2020.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/3910716421.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_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 5316 bytes
SHA-256: 6fcd1c57764613f6f81ffb1ef619b1c302a467bc155f2ad63efff120810003e2
font_01_sfnt_off0000fcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD6 10832 bytes
SHA-256: f18c030f53aeb2762e404396da55b8eaee44bc8850e5aeb6091b9356f63a063c