Malicious PDF — malware analysis report

Static analysis result for SHA-256 f522c0cbe0344825…

MALICIOUS

PDF

79.0 KB Created: 2021-03-05 06:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 49485c9c91b16bb69883b7599b6652b0 SHA-1: 8353840780053b2968168d5e6fd966db827e0360 SHA-256: f522c0cbe0344825aed54c61ce4381dbb76942e2074be383becd813ce01b1332
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm designed for SEO manipulation and potentially malware distribution. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious or unwanted content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/wix?keyword=shareit+apk+for+pc+old+version PDF link annotation
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/403141.pdfIn PDF document text
    • https://texifuxifom.weebly.com/uploads/1/3/0/7/130776695/4296321.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/9e27f666.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/tozorixido.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/fba2a.pdfIn PDF document text
    • https://pipedexow.weebly.com/uploads/1/3/4/8/134852679/b8cd79d6a056.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/5431753.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/a91b3.pdfIn PDF document text
    • https://givozerav.weebly.com/uploads/1/3/2/7/132710596/e01c31cb.pdfIn PDF document text
    • http://sonuzevemuguke.iblogger.org/dscr_worksheet_for_term_loan.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/rexatebopofixutibo.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/c7fd2d7b-b4af-4882-b1c6-879a6c177a22/ridulowanepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9bd11d-ba56-49ff-89c2-d39a648adde3/sap_hana_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fc1a66-5875-446b-a366-3797f30464de/dadegisujez.pdfIn PDF document text
    • http://mejufupivu.epizy.com/pogozefofadefal.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_0708892b2aa44429b0ad2f7b9f8051bd.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_d8babba0bf0c4a208b6a639129dc3b2d.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_79af06992ea9480d8a5e34a6cbe93101.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_3789b95f91b34fbc9e609d697e98734a.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_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 5468 bytes
SHA-256: 20dab0f335c4fe4f4807818b5be9c1d8cfed7dd8f82da85c6bc140463466f043
font_01_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 15324 bytes
SHA-256: 74476d0074278fe35cae5fa3049cd9e02c244f3bf4a4545984b08c6d7accb04f