Malicious PDF — malware analysis report

Static analysis result for SHA-256 a925618a8cf4f16b…

MALICIOUS

PDF

81.5 KB Created: 2021-02-25 09:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 43e83ceb15f0305b5c935df4faac03e1 SHA-1: 7953cb72bec4f15fa826810a0f7432bdec72b728 SHA-256: a925618a8cf4f16bd4429b13931848cce71ba9e9cfd28ce04b869d4b63c798a0
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming. Although no scripts were extracted, the presence of many URLs and the PDF structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/aws?utm_term=different+types+of+jiu+jitsu+belts PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/czjdiij/condado_vanderbilt_in_san_juan.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/4d7bb5.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/jaFhfd2/88395796441.pdfIn PDF document text
    • http://novedexezenel.66ghz.com/88448164521.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/15799542320.pdfIn PDF document text
    • https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/1f2848998e8765.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/ijgg8hd/frederick_douglass_learning_to_read_and_write_questions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekovip.rf.gd/cub_scout_store_memphis_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/bojonigilisumujap.pdfIn PDF document text
    • http://volififujuwimi.epizy.com/colchester_sixth_form_phone_number.pdfIn PDF document text
    • http://dasujisetojasel.epizy.com/11095682084.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/27521086514.pdfIn PDF document text
    • http://mapoler.epizy.com/markets_with_asymmetric_information.pdfIn PDF document text
    • http://vaxutusurinav.epizy.com/70082471471.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_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 5004 bytes
SHA-256: aeca900e26ee27c0a63ed6f43f00bada62aca80f593b7c43f460d662f95ca19b
font_01_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 10724 bytes
SHA-256: 54e6c6865b63fb649e1f21cb78684a4b6512237a186821cba4de67d96a82d74d

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