Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe60fc3d4906548…

MALICIOUS

PDF

65.3 KB Created: 2020-11-12 23:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf58505b17c2c180a139f528fb505a86 SHA-1: 59ab29baebcd311a1c397645985e7b8d3a71c9fc SHA-256: afe60fc3d4906548f8c693159001c432e360766aa49fc7f8192a441200212335
186 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 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
  • 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://trafffi.ru/strik?utm_term=use+of+guide+sticker+screen+protector PDF link annotation
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/2756542.pdfIn PDF document text
    • https://jotevugujuz.weebly.com/uploads/1/3/4/6/134675951/5317292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5fa669443c814.pdfIn PDF document text
    • https://matoxidatu.weebly.com/uploads/1/3/4/6/134602194/ravagarikitu_kigal_ritefa_sazidivamajaz.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/8500017.pdfIn PDF document text
    • https://vuvofazomegudej.weebly.com/uploads/1/3/4/3/134329778/tovapoxijufiwofokufe.pdfIn PDF document text
    • https://wokesije.weebly.com/uploads/1/3/4/5/134597961/goxiwifu.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/188d4a54-f98c-4135-a18a-63c3d2a84fed/mortal_kombat_vs_dc_universe_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6689fc4-bb10-4ae2-a774-fc61d4f204a6/lofojukaditaxefaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeab22b8-da72-4aa6-b823-2e3b64820e75/limixavetuwirodotofuweje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75da58d-28cb-4217-a6db-1529c7350ed0/nuduvunazopunigaxawawebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60a6fe5-56fd-4633-b8e6-30ac231ec1a9/lomajalowi.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_off0000c384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC384 5136 bytes
SHA-256: e337d07be510e874675ae9a19e322ce91b4fdc2c8753f5ef20cb7bbaf962e278
font_01_sfnt_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 10176 bytes
SHA-256: b282b27ae4c808f0fc9056dde393343ed007b23ec775c013fcf78deb29809f7a