Malicious PDF — malware analysis report

Static analysis result for SHA-256 b065bf286168acdf…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 14:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3f593062e9345a8e2553297d4bf4c695 SHA-1: d8b7f14f59c09a33a81ab45b045aa3e61e4d609f SHA-256: b065bf286168acdfd4d5acb4b02dc61203e659b69c5ad9ef691da05c86bac198
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to external URLs. The presence of multiple disposable hosting domains and a suspicious URL suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely related to spearphishing.

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://maypoin.ru/award?keyword=acca+f5+pocket+notes+pdf PDF link annotation
    • https://bevifosadorafot.weebly.com/uploads/1/3/1/8/131856546/fd7d0135f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_601dcc5ebadfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_601f318ec5286.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/e48c6eb227e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_604352a2d17e8.pdfIn PDF document text
    • http://fevonijanufoweg.iblogger.org/80053181070.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/5cc9710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_5fda3c3a458ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_600db5c3a905f.pdfIn PDF document text
    • http://wukivobezoba.iblogger.org/annotated_bibliography_guidelines.pdfIn PDF document text
    • https://butavuzi.weebly.com/uploads/1/3/2/6/132682386/9575371.pdfIn PDF document text
    • https://nagafibujur.weebly.com/uploads/1/3/4/5/134514283/fijitijugevo_nakuno_jozeridejimiw_xiduziku.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/80238e28-7e86-4576-a96d-c5dbda17563f/which_verbs_are_irregular.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_e16ebd7f66c1416288c41a9474ceab73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad07fa8a-795d-46a2-9743-7fad412cc20f/cuantos_cm_son_un_metro_lineal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4ce83b-fb95-402f-8495-bcf727d415f5/are_great_dane_puppies_aggressive.pdfIn PDF document text
    • http://jexalajepufuxin.rf.gd/87409946769.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_2cebee2d44134b709b30ef14acf9e825.pdf?index=trueIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_b4d812a74aaf41d4a26b0d7b1c082815.pdf?index=trueIn 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_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 5200 bytes
SHA-256: 0a03904c0253934245ad22ee6027a867b9c4602f6d6c627d03b4775a7dc83084
font_01_sfnt_off0001229c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229C 12156 bytes
SHA-256: c2b9f05981189d4fc3253a9a83ac04af92c1d3e3d9af55b23828624a8adcb66d

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