Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3da2689e95ccff…

MALICIOUS

PDF

62.4 KB Created: 2020-12-24 12:43:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d32c7211c200af555a14737372e01d20 SHA-1: b747aa797cef1cc1a19691930a9c668b0aa19485 SHA-256: 1f3da2689e95ccffe29c1d5803a5879bf8d196a0341b1d14435e90e8cc8a2e1c
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, including one pointing to known malicious redirector infrastructure at 'traffine.ru'. The document appears to be a link farm designed to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/strik?utm_term=escape+grandma%2527+s+house+2+fortnite In PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/c6d02b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_5f9f36e7bfefe.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/pukexanapoto.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/3098692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fc6a5844b28c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f8b266f1169f.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/diwawekorun_fitekebekulepa.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/0d81fb9a-ffda-493d-acf3-1ff17cd26689/ways_to_knock_someone_out.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/vampire_diaries_season_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36b84c78-9761-49f4-864b-eb3d07e6648c/82058314157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aa045af-3c77-46c6-bad5-575ba4555dee/pdf_kaise_banate_hai_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e610f6c9-286c-47f5-a5cf-828f038cc426/how_to_make_a_simple_app_in_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ebbca5-ec99-49cc-9dcd-fac5c4582a63/zifobuvomumuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54300055-6081-4264-8a31-294d3905c87e/zoology_practical_file_bsc_1_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63dfbf6-1e97-4455-9f5c-a46454e49480/zezefediverusaredawe.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_off0000b676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB676 5660 bytes
SHA-256: 4d740c4db500159f498faf49703f6731602502aebe2388a0163b131574c90014
font_01_sfnt_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 10220 bytes
SHA-256: 9acffd0a0684b9bcc08b9860b8fde117a4499625609015d4bb47365e20b16643

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