Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08534175abb3a63…

MALICIOUS

PDF

69.5 KB Created: 2020-12-11 13:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c5c2e41c10a956b40e8ec172e9c9689 SHA-1: a97747670c35907ec268b306381cacd34bf1eea9 SHA-256: a08534175abb3a63912141821a914d37b804fd99e3e78e63627fa2854dc29863
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 0.9997

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 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://traffset.ru/aws?utm_term=bhairava+video+song+mp4 PDF link annotation
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/ramupizokoxifewusew.pdfIn PDF document text
    • https://dixetomik.weebly.com/uploads/1/3/4/7/134775969/619908.pdfIn PDF document text
    • https://totorososine.weebly.com/uploads/1/3/4/8/134892144/gizedodorejega_jezawox_pemetuwekeduvi_fimisufikejap.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/2368cdd.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/temuwabazer_renozojife_fesufu_xolukixut.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/lidubiwofunepo.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/pukuk.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/2251314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc49a6fa97599144e8b65e0/1606720111982/lizinimar.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/artificial_intelligence_in_hospitals_and_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06bdd26c-2b4d-44df-868a-070745b3ccd4/gekudafuzezamasegi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/cartoonito_uk_tv_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1999f5e8e827d4292cb4b/t/5fc492a8f3de5e49b5f6ec45/1606718122955/the_yellow_wallpaper_quotes.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_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 5540 bytes
SHA-256: 6b29c513b5668fd173b3e3cf709229e1c39a80986a9c8edc04c762105be3484c
font_01_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 11424 bytes
SHA-256: 1ae08a02ffec7ecdd5540ba80dd9e87338edc733931f2822f711b9ac86336cd9