Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bfebfe7ed172a0…

MALICIOUS

PDF

109.6 KB Created: 2020-11-18 03:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 308993c083bcb4abe7a8a2e4eecce9d9 SHA-1: 1a0182bf7ece882a2fb4f1ece1c418587eba812d SHA-256: a5bfebfe7ed172a055b19ee4969f78fbf50b2388b65bccfe03201a7eef65a542
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. One of the embedded URIs, 'https://trafffe.ru/123?utm_term=winged+dragon+of+ra+chant', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://trafffe.ru/123?utm_term=winged+dragon+of+ra+chant PDF link annotation
    • https://kedixezowudogaj.weebly.com/uploads/1/3/4/6/134618790/1ed3fd7b6f50.pdfIn PDF document text
    • https://derewoju.weebly.com/uploads/1/3/4/3/134319287/piraro.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/38037c2e-0cf6-4dca-8994-a2145b187d1d/delgado_critical_race_theory_the_cutting_edge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01650989-c179-4b19-98ae-7fb0dfefb80e/billed_customers_for_services_performed_journal_entry.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/sample_eviction_letter_to_family_member_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/eres_tu_maria_episode_9_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/sociology_a_level_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2085dd48-4ec5-4efa-8bb6-42ed13a28a21/93259759760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fde82c-8783-4377-803d-2ee0f704cf6b/college_football_scores_today_scores_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc57541-ddce-4e8e-b63f-246ae9a8a52c/dibarugiwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5700e562-854b-453b-a77c-78d55b5e1118/dejaramenugugufutosoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lujavuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/39172081261.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/away_luggage_battery_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000eb4f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEB4F 44400 bytes
SHA-256: ac22561e8d3ac66faffa23f726fd911be112e8d91837c9a7caf5909c9ff5e23f
font_01_sfnt_off0001741b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1741B 5084 bytes
SHA-256: 1e4cf7876246af46e4a934af844465706728f2e049b27e6358bbe0ddf2d76cbd
font_02_sfnt_off00018578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18578 10892 bytes
SHA-256: fa0c571e36f8ed0b320c23486577d641bbebee6fd4f529d87cbcfe646397aefd

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