Malicious PDF — malware analysis report

Static analysis result for SHA-256 2062da3ab1f32a8e…

MALICIOUS

PDF

80.1 KB Created: 2021-05-29 15:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: be771723bfa0e9b9e41fc711ae5db3cb SHA-1: 1b1d7448afec7d79b835b41c9696a3c604b5bb7e SHA-256: 2062da3ab1f32a8e0d74c774ac97adf5b101b716f1d8d40b4af133f333fb785c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious content or phishing sites. No scripts were extracted from this sample, but the PDF structure itself is indicative of malicious intent.

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://leonvi.ru/123?utm_term=technical+drawing+tools+and+their+uses+pdf PDF link annotation
    • https://mobasukirogejus.weebly.com/uploads/1/3/1/4/131453019/7465517.pdfIn PDF document text
    • https://vimawagugagepa.weebly.com/uploads/1/3/4/7/134732412/sejuxe_nenukuwimuk_fobabi_movugikefetu.pdfIn PDF document text
    • https://xemaxokiba.weebly.com/uploads/1/3/4/3/134350412/5e1559f9.pdfIn PDF document text
    • https://woxoxoba.weebly.com/uploads/1/3/4/8/134893248/5ad13a558725.pdfIn PDF document text
    • https://fekolulowezomo.weebly.com/uploads/1/3/4/5/134593542/4a663c906e.pdfIn PDF document text
    • https://suxawadukisefi.weebly.com/uploads/1/3/4/7/134713915/4872052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_6059450502d27.pdfIn PDF document text
    • https://xamifixi.weebly.com/uploads/1/3/1/8/131871938/214b72605.pdfIn PDF document text
    • https://sonadenazutimiw.weebly.com/uploads/1/3/4/6/134654654/rowabuw.pdfIn PDF document text
    • https://rusijarumeza.weebly.com/uploads/1/3/1/8/131871651/duboxefubato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_603c2a2f17023.pdfIn PDF document text
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/pipiwenidoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_60143101bfce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_602c24c91f919.pdfIn PDF document text
    • https://luvemolovod.weebly.com/uploads/1/3/4/3/134305721/5485c52.pdfIn PDF document text
    • https://revixapega.weebly.com/uploads/1/3/4/6/134619396/xexuwajekesejiw_derilemuna_farag.pdfIn PDF document text
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/doziputewedi.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/6fe8b535-1f55-4e9a-9ea7-d892611b7ef9/gofiruvutabonakonovig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b899a06-932b-40a0-adf4-8e10287e9434/what_is_an_equation_that_shows_the_relationship_between_two_or_more_quantities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d22d0f70-0ae9-4fb0-b5ce-3232577ac856/82870692794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63723f22-be3b-467c-be64-9caac89aa579/35286966102.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 1528 bytes
SHA-256: 906312b206573a369fdf05f2d58baf7f592464f3d990fc278d772a9a6a9aa3be
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 5456 bytes
SHA-256: d56d8ee6d293e67706cd6c0bef1ecb16016eeecc3de8298c8d488afafb89e23a
font_02_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 10628 bytes
SHA-256: 6a71b6b79db07dd9b2440fa090bc66a39c631d7e3cbdfd766cd1d873079b8919