Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24ae865f83184d8…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 10:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 698fe98b292bb9b445a544753eed4710 SHA-1: 803789e048a3adf34ab9c118779e571914f110f9 SHA-256: f24ae865f83184d8122345d4b30768d00f3150ae593c1a944749dee463a8d722
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=businessman+songs++mahesh+babu PDF link annotation
    • https://zijoganidilo.weebly.com/uploads/1/3/1/8/131856317/15ea7.pdfIn PDF document text
    • https://sukowuxipimo.weebly.com/uploads/1/3/4/3/134318810/wevawa.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_integrate_software.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/1427527.pdfIn PDF document text
    • http://mitsumoro.ru/web_service_providers_in_delhihuqp0.pdfIn PDF document text
    • http://goloszauniver.fun/56015371524a0dy7.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/83162467853.pdfIn PDF document text
    • http://carins.info/fly_tying_bench_for_sale_ukb79sb.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/tamil_to_english_dictionary_free_download.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/dokilowijasilaruwu.pdfIn PDF document text
    • https://pozetegafikule.weebly.com/uploads/1/3/4/8/134857311/debarutuka-xemapati-dadologur.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/3fda11ee.pdfIn PDF document text
    • https://gidepojijozi.weebly.com/uploads/1/3/4/2/134235950/zobojuret_fujanepoguxu_varumodo.pdfIn PDF document text
    • http://nesegejisivinu.medianewsonline.com/kakofedavavorejojuzobote.pdfIn PDF document text
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/fipoputimaw-goxafozebir-vawejuxapogu-xofapuluzuv.pdfIn PDF document text
    • http://xomerisupudegop.medianewsonline.com/sisorivuzisivemesuzejoteg.pdfIn PDF document text
    • https://fobamenowukar.weebly.com/uploads/1/3/4/4/134485242/9551329.pdfIn PDF document text
    • https://lavigepes.weebly.com/uploads/1/3/4/4/134437347/6794022.pdfIn PDF document text
    • http://olipaka.xyz/janusaguxakikixuvuzelihtgga.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/peruvian_gamefowl_fighting_style.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peruroz.onlinewebshop.net/79783154003.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_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 5160 bytes
SHA-256: f158def392f81cce1e41c4fcce84a6b3bca338efe6c670b43ab40d2d575f04b3
font_01_sfnt_off0000ff14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF14 10856 bytes
SHA-256: 80b14a89b2b07a41cd541c39958745775161e74a8568d5218350c29c079531b8

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