Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6eb02b7bd06d9da…

MALICIOUS

PDF

78.0 KB Created: 2021-05-17 01:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 90525b84491983e23749a8feb0545098 SHA-1: 53c82a8e66fbabd7a690a69d9a26dc9b15f91b46 SHA-256: a6eb02b7bd06d9da6fd6730a202e5f460563c0df0834f46e23ae7c27174df668
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a mass of external links, identified as a link farm. One of the primary URLs, 'https://leonvi.ru/strik?utm_term=a+que+se+debe+el+dolor+de+cuello+del+lado+izquierdo', is likely used to redirect users to malicious content or phishing pages. The presence of numerous links and the ClamAV detection strongly indicate a malicious intent, possibly related to phishing or SEO manipulation.

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://leonvi.ru/strik?utm_term=a+que+se+debe+el+dolor+de+cuello+del+lado+izquierdo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4504922/normal_5fea267c7c8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459796/normal_604cd0cf2d15c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5fcfa195498de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_60025316e5502.pdfIn PDF document text
    • http://genusadnlo.space/57044524019yzg9v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_6066f97e909ee.pdfIn PDF document text
    • http://prizinsta365.online/babul_da_vehra_song_djpunjabmj988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6065cb62539db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_6056f52a9bb81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_6033696dc9d98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutisigila/vizio_tv_model_number_e701i-a3.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_d06334bb21ee498682a6ea70e30e5276.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/what_company_policies_are_required_by_law_uk.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_7131aad7733b478cb1a30999a97752ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/chillhop_essentials_spring_2018.pdfIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_e286b6a39e614edeb8a835cc06191d85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jipowumat/52056984255.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/wadafoduximuvodex.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_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 5236 bytes
SHA-256: fc6ef509c86351cc2cfe52bc6387c927b7218ebd190b874772bae7ca2147663d
font_01_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 11048 bytes
SHA-256: 162c7c8572798b4abe5b3e4bcef8ebd48d93fc7b1b439da1cd60acf9cb51dea1

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