Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da3dc0dd065d7a0…

MALICIOUS

PDF

69.4 KB Created: 2021-02-16 10:38:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a7711ad2cb2800243a01576cdfc55f5d SHA-1: ab7537c617bc314846d307f33c3649b83b5e7782 SHA-256: 4da3dc0dd065d7a09656fabc7d758baa5b2bfa4aa1c12a0b3cd11c4db9f7ad9e
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=vanilla+rabbit+cakes In PDF document text
    • https://cdn.sqhk.co/bureruverog/iegiGO6/81372380468.pdfIn PDF document text
    • https://tedagenuv.weebly.com/uploads/1/3/2/6/132682668/a16a498b130e.pdfIn PDF document text
    • https://cdn.sqhk.co/dogatefi/U5OQhiY/29916715618.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367921/normal_5ff9a5d4ddea3.pdfIn PDF document text
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/rovaxu.pdfIn PDF document text
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/boxemuvejeta_witekavibux_lekozopevinod_vorebuv.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/bdc90.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/zufufeduwe.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/7094841.pdfIn PDF document text
    • https://nuvutujozexavu.weebly.com/uploads/1/3/4/1/134131277/6a52399b.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/xafulunupe.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/jf7gchh/falling_action_definition_literature_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruxuwidoke.epizy.com/rarapuk.pdfIn PDF document text
    • http://rexerikilo.epizy.com/25564064268.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 4960 bytes
SHA-256: 97ac4a15445928fa0746eb95ba5e70ee85c81bf68efa3406cedd8580cedefd93
font_01_sfnt_off0000e4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EB 10680 bytes
SHA-256: 1544ed392387c03b3739963bcba20496b45a006735047ccadc7b0eb1ca6681cc

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