Malicious PDF — malware analysis report

Static analysis result for SHA-256 2451626936be1f31…

MALICIOUS

PDF

74.0 KB Created: 2021-03-21 03:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0a1583eca1a63dc63605bc8ddea4938b SHA-1: 48e7a6c5cb4187344556f4614d989fb467916b17 SHA-256: 2451626936be1f31a52cbce1146b950195961e7302de6a4d41ea73271f5f7f81
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. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The primary malicious URL identified is https://lozipotod.ru/strik?utm_term=krk+rokit+g4+setup, which is likely used to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=krk+rokit+g4+setup PDF link annotation
    • https://cdn.sqhk.co/miwizawi/YDjgjhj/tixigobubutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_6047ab959d573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5ffeb2cc63d0e.pdfIn PDF document text
    • http://fuzepeter.22web.org/fegezalibogubil.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/ieijBie/download_muse_dash_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_601ef4fe3edd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fdb1b169e2f6.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/hfohhPp/nojopofogegozazixuduza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_9a5f663cfc4548daa931043d848e7fa0.pdf?index=trueIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_10499cf4a115417aae34a8d4d1ffebdf.pdf?index=trueIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_efa5317fc13e4102a7e3d55e93353c86.pdf?index=trueIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_0ec760cf169244a9a1ef3e9e29233a5f.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_932b692ff7104b5a858f8208b2db38d4.pdf?index=trueIn PDF document text
    • http://favagapararo.epizy.com/lisiperukugiginikol.pdfIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_4c0a24b18c404767a3ae62fb901504c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megulu/pirelex.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/ascii_code_for_form_feed.pdfIn PDF document text
    • http://tunivepusage.epizy.com/title_1_comparability_report.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_13af7eb486ce46b9b5e160528055f62c.pdf?index=trueIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_03e89fea2358410ebc3e579cb87f4437.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_off0000e6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 4868 bytes
SHA-256: 60170aad5d7322d177023727485f0882349471f391e62f96b3449153a68425bf
font_01_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 10212 bytes
SHA-256: 64120f427cb4e3f486f319d3245b8564dfec3fbe5397262c30d8e28b068f4102