Malicious PDF — malware analysis report

Static analysis result for SHA-256 623d080e27ed46b0…

MALICIOUS

PDF

70.9 KB Created: 2021-05-30 11:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8475273ff7d906fcd8fc8a89ae24cbd2 SHA-1: 1f42174243ea00f96da028afcd2101599b15bc3c SHA-256: 623d080e27ed46b02cdba979e65e70b9323b6321e101d33031e997def1913ef6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://botokaw.ru/strik?utm_term=marshall+mathers+lp+download+free+mp3 PDF link annotation
    • https://nugaruxiboxora.weebly.com/uploads/1/3/0/7/130738781/xopaj.pdfIn PDF document text
    • https://xurulojoxog.weebly.com/uploads/1/3/5/3/135323168/maginutovibu_vupiv_bidowe_mogumifawit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_6022c2f18b05d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ffc47ba38e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454671/normal_6010750b2ddd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_6033c543cb68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_601d157d972c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_604f31282ab1e.pdfIn PDF document text
    • https://benadegerabo.weebly.com/uploads/1/3/0/8/130874398/zinekimamira-rutinim-wuserozotokizuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_604802949f38c.pdfIn PDF document text
    • https://peramixirado.weebly.com/uploads/1/3/1/6/131637131/popog_dewawidadowine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fdbb41b71686.pdfIn PDF document text
    • https://defavelusanopef.weebly.com/uploads/1/3/5/3/135345674/nimedenewop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459025/normal_5ffdedf2328d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/209bec85-0907-4f88-93a1-804e565c0349/27651139874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b998553-eb4e-44e7-b3ed-80e18d038959/samsung_galaxy_tablet_10.1_power_cord.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
font_00_sfnt_off0000c5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DC 5284 bytes
SHA-256: 7b186bad35ecb6adca9f8a17c9396d2c1a0aebdfb28f271cb73bf2f655a33c0b
font_01_sfnt_off0000d7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 12836 bytes
SHA-256: b5de4c66e660d8fe0c6d3307909b877c7d39aae938defcfb5e256cfb9f2b142f
font_02_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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