Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa682020f9ca7d1…

MALICIOUS

PDF

81.7 KB Created: 2021-02-13 21:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c7a2e2f8be7408395b925d8647dd3bf3 SHA-1: 9fd08c25f30b48ad4dbccc280cb14d2614f900ef SHA-256: daa682020f9ca7d13f729e25399636f86590f4ddff500a912695e4f95125ccc0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of multiple external URIs and the overall structure indicate a potential attempt to redirect users to malicious content or phishing 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
  • 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://bologen.ru/aws?utm_term=characteristics+of+spore+forming+bacteria PDF link annotation
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/ruluvarefapil_wozakulugajasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5fe1c2015ba69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_6020af19be95e.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/6911340.pdfIn PDF document text
    • https://rawadawopi.weebly.com/uploads/1/3/0/8/130874142/fegiwugipimozod_muzuja_sovovujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/A34agjn/project_cars_radbull_drift_setup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_5fc79bbdc853f.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/9909594.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/tulonuwi.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/nuselufuzo/what_is_alpha_helix_and_beta_sheet.pdfIn PDF document text
    • http://pemukusa.epizy.com/somaxeko.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/25486863430.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_off00010150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10150 5440 bytes
SHA-256: a37fa56bbdf17547e03854625588ddda51b7f5dfbb9d5906e158e398b257cbcf
font_01_sfnt_off000113a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A2 11124 bytes
SHA-256: 7de06fb95a5f10d789c26da20be02fbf8867eb849965fac0b0f98704ac0533cb

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