Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b163bd0a8d330b0…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 01:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0b4cf11f40f904d2e7a1d58ef2784095 SHA-1: cbfb652b00a3b6dbe8705e8aeec35e7334f66eac SHA-256: 8b163bd0a8d330b01a963292534f77224710b492f22ad0fe3fc47419f2e9e84e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to disposable domains, which is characteristic of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to distribute phishing content or malware. The embedded URLs suggest a tactic to manipulate search engine results or lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=gas+pipe+explosion+hounslow PDF link annotation
    • http://maxidadikegi.iblogger.org/45082489705.pdfIn PDF document text
    • https://vubujoxesawuzar.weebly.com/uploads/1/3/4/4/134476738/5d3b90a6356be.pdfIn PDF document text
    • https://mezufimuvuleto.weebly.com/uploads/1/3/4/0/134016906/jilofozez.pdfIn PDF document text
    • http://tuleruwigex.iblogger.org/alfa_cetoanalogos.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/277735107a7399.pdfIn PDF document text
    • http://sekegixederixit.iblogger.org/checklist_manifesto_book.pdfIn PDF document text
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/2317350.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/f85bcf35-e0fc-412c-9613-c075b3a21351/27090160394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cda9e43-4499-475b-97a5-4654acea5a83/53265542981.pdfIn PDF document text
    • http://jutibigata.epizy.com/historical_perspective_of_nursing_informatics.pdfIn PDF document text
    • http://golizewojavizav.epizy.com/what_is_the_best_app_to_learn_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6d11e2-85a7-4bcd-be53-6c2e10626101/86465484845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5999cfcd-63ce-4fe9-b627-3b6cf77e4c23/how_to_focus_celestron_astromaster_90.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfbeb5c-82c0-4fcd-a68e-1460cf9e5c04/bios_asus_p9x79_pro.pdfIn PDF document text
    • http://kizifisen.rf.gd/xexazibatixew.pdfIn PDF document text
    • http://zotoputoxo.rf.gd/78280783695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7a3ab8-abb3-4c53-8d8c-01856db79357/suzudapesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806d5729-e2f3-4adf-8c14-d201cfda4b59/tukakil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f714dc3-5950-4670-acdd-5a39cd7dfe82/jowurizazegafojovovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511026cd-184b-4391-8c94-5d2348ff992c/uscg_marine_safety_manual.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_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 5000 bytes
SHA-256: dc5b4e80cea3d2cc91868a791f25b4abfabc77b1c57f597dee75022c91075680
font_01_sfnt_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 12092 bytes
SHA-256: bb977b2f443059645a5fd0be0be27eb3247d836dedec4532cf74e5f14fcc7670

Open this report in the interactive analyzer, or submit your own file for analysis.