Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63a160450bf7021…

MALICIOUS

PDF

71.0 KB Created: 2021-02-27 06:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f8dfd539b833d42f38674c7eceb8107 SHA-1: 111429544b818eb7bd0b5a2af6ac0dc25d30ed91 SHA-256: a63a160450bf70215559e5e1d77a71f331c957c397beeb311964c82d8d52d6ee
156 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 0.9998

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=what+is+the+best+weber+grill+for+the+money PDF link annotation
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/e10566a1.pdfIn PDF document text
    • https://daputonekamipit.weebly.com/uploads/1/3/0/7/130775603/e28f37730484d07.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/9f80bb25bf1e.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/378283.pdfIn PDF document text
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/dofizevizi.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/72332f0d.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/how_to_do_a_voltage_drop_test_on_fuel_pump_relay.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekezoxugi.rf.gd/bloodline_movie_2019_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/silad.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/86328161950.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/auto_exposure_bracketing_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/fesinesex.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/29798798094.pdfIn PDF document text
    • http://javasuk.epizy.com/fiori_guidelines_flexible_column_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/assignment_abroad_times_today.pdfIn PDF document text
    • http://vatoduk.rf.gd/wirarabinob.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_off0000d6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B4 5528 bytes
SHA-256: 1093bfd2c5195fff460a2a02789bf03b601eb16839c72e576098065e00327bb8
font_01_sfnt_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 11208 bytes
SHA-256: 7dd09f04ddf050bd7e024649e462c912839bf6e4b01541ba3b5b731922f62bf9

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