Malicious PDF — malware analysis report

Static analysis result for SHA-256 031704a032b75e11…

MALICIOUS

PDF

41.0 KB Created: 2020-09-30 22:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2d00f350df92777e3266bcd9952984aa SHA-1: e07bb7432d04e6a143a44fa89e79407ba7970a98 SHA-256: 031704a032b75e11bc6ca952a6d155e2557bf8681c24d47576331e35c7f8c46b
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://gettraff.ru/strik?keyword=attestation+letter+of+good+character+pdf In PDF document text
    • http://bosut.nauakablehands.com/uploads/1/3/2/7/132710589/c9283d7ede9ce15.pdfIn PDF document text
    • http://files.dennismccalmont.com/uploads/1/3/0/7/130775518/wuladobavif_megapitokudaled_ramejeredeg.pdfIn PDF document text
    • http://files.bigbearsartstudio.com/uploads/1/3/0/7/130776131/kapate.pdfIn PDF document text
    • https://site-1037075.mozfiles.com/files/1037075/tapaseniwanu.pdfIn PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/tibopopoxegubul.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/79790738899.pdfIn PDF document text
    • https://site-1038365.mozfiles.com/files/1038365/82951440651.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/kowejo.pdfIn PDF document text
    • http://files.kennelamorras.se/uploads/1/3/0/8/130873877/74fcba03016ecb7.pdfIn PDF document text
    • http://turikix.mvmbbc.org/uploads/1/3/0/9/130969149/3224983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 5408 bytes
SHA-256: 898de6ca20ebea7f48c9b95674141ffc8a7a79a8fdaa5f3f8c411bac4b20f002
font_01_sfnt_off00007525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 10040 bytes
SHA-256: 64f8868f79de8f3d99d088aff14ad33e65896a298ba33199aa523de9606a1657