Malicious PDF — malware analysis report

Static analysis result for SHA-256 95104732488d6e44…

MALICIOUS

PDF

34.7 KB Created: 2020-10-05 07:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 13bd8eda1366c55c3111a6fc4ad4fe6c SHA-1: 40f88d4845f2e61e1f534bc66926d722804542a4 SHA-256: 95104732488d6e44a8c35138c9a0f8da829065de14d4c0c9f19a8b999ffe7f7e
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://ggtraff.ru/strik?keyword=promethean+activinspire+indir In PDF document text
    • https://site-1037011.mozfiles.com/files/1037011/lesofozogozog.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/98198657243.pdfIn PDF document text
    • https://site-1041591.mozfiles.com/files/1041591/sofut.pdfIn PDF document text
    • https://site-1037903.mozfiles.com/files/1037903/kalaxojiriwibojiboz.pdfIn PDF document text
    • http://bukab.elegantcooking.com/uploads/1/3/1/3/131381067/a38f214.pdfIn PDF document text
    • http://files.longlakehounds.com/uploads/1/3/0/8/130813755/gedaseriguropa-xavapolubeviwa-soxukavesidumor-kagixudox.pdfIn PDF document text
    • http://files.bberidesserts.com/uploads/1/3/1/6/131637498/taketepifaju_labiweraluzax_wonewomab_gaporupajomet.pdfIn PDF document text
    • http://files.forestfit.net/uploads/1/3/1/0/131070765/mobowevulevusiz-mugubenifuxepi-bumiw-kelomiwuber.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5034/7943/files/rua_defensive_driver_test_answers_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4490/8455/files/xamezexudiwojifisefeluf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9724/6884/files/lebisetupowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63850a45-53a7-4014-99d9-0e7e80453b37/45601546889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f3288a-ee5d-457b-b1a1-79df7b23abed/fiwinazawibanazigu.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_off000049b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B1 5340 bytes
SHA-256: 780e5b250e388d1e933f3023aa393920499919b0c6bade45bdfafe9732e4aead
font_01_sfnt_off00005bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB4 10280 bytes
SHA-256: b6f0df0d0a9eb64c65bc5e3fd115141a2d84afeb490ebaa7ddea2696ea3824fb

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