Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68d59b9a6252145…

MALICIOUS

PDF

74.4 KB Created: 2021-03-24 07:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9c7888af4ad10cd589ed72af2e9a6c91 SHA-1: c1dc0bc982bd733e18dea4904cfe1d9bc13b5c24 SHA-256: d68d59b9a62521452b5d9df48d50ce9d42d6bd2f5a2f0efcf0456c42f7d2920e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter further supports a campaign-like distribution strategy, likely aiming to redirect users to malicious sites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://vilenefex.ru/123?utm_term=bahubali+full+movie+2 PDF link annotation
    • http://flebolog24.com/their_eyes_were_watching_god_symbolism_quotesb4h8q.pdfIn PDF document text
    • https://wezifujizofuji.weebly.com/uploads/1/3/4/9/134904593/xeraxamexavigik.pdfIn PDF document text
    • http://koteyarn.moscow/72051716808jsqag.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/oBpmahe/1000079054.pdfIn PDF document text
    • http://harmony-market.ru/baby_soothing_sounds8umc7.pdfIn PDF document text
    • https://tusozokusex.weebly.com/uploads/1/3/4/6/134678333/b689ef0d86c28a3.pdfIn PDF document text
    • https://siroxaje.weebly.com/uploads/1/3/4/0/134000026/8377046.pdfIn PDF document text
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/4461417.pdfIn PDF document text
    • https://cdn.sqhk.co/xunixenovapi/c7ibTgg/boposibopivujes.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/es3n3hd/rally_s_checkers_coupons.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/jubub.pdfIn PDF document text
    • http://50offshop.info/vadideki_zambak_dr9gmtm.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/fwadjhr/zijanumebojipizoto.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/namizo.pdfIn PDF document text
    • http://verifedform.com/19610451894umsg8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_37141cdd281a4acf88e1bc87592f2f23.pdf?index=trueIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_06333b1ff2e94fa58667d6f1f785a9a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/780b82fa-564c-43a8-ad70-4bfcce7f1956/pisaxum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b12fa0a-27c1-4332-a153-498e3343217f/heat_and_glo_fireplace_turns_on_by_itself.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_7a0b27f6c23542718940861e275f03e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ae4631-3b25-4ee2-b6e5-7fe30053e098/what_are_engineering_drawings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1929e7f-06c0-48af-a469-68986aea81ff/39657724864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d5e958-1825-432a-b6c9-e8b31db5199e/how_to_read_resistor_color_code_chart.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_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 5116 bytes
SHA-256: 6040e34dc53f2159378e28af58b8c67e4a39e66f7e998bb92a57b26c55e97d3e
font_01_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 11092 bytes
SHA-256: 59e3d486e1d870addcd5a2ea0acba63ee91fb0929bf340a9734e5f01c73bb90a