Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a69f673de5f2e2…

MALICIOUS

PDF

45.7 KB Created: 2020-10-15 04:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a85eb3cf658e23840260215a9f29eaec SHA-1: 354312b407bc40f41f5545b461330e919dc99ddf SHA-256: c7a69f673de5f2e24757b3d0115030d821e1fda31662cdfa54eeebbc4d1eff90
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=calls+going+straight+to+voicemail+android In PDF document text
    • https://site-1041770.mozfiles.com/files/1041770/faguxisivaranak.pdfIn PDF document text
    • https://site-1039719.mozfiles.com/files/1039719/viloduferobada.pdfIn PDF document text
    • https://site-1043880.mozfiles.com/files/1043880/65179634807.pdfIn PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/zusujaxen.pdfIn PDF document text
    • https://site-1039733.mozfiles.com/files/1039733/30063525654.pdfIn PDF document text
    • https://site-1042282.mozfiles.com/files/1042282/rebefodunulideterikupaj.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/16169314249.pdfIn PDF document text
    • https://site-1040995.mozfiles.com/files/1040995/23914858732.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8713e402f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f876f282df35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6d04de-8c6a-4f8c-8033-f0c5cd8be460/25853702409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0faac01b-c9cf-467f-ac0e-2c0755882bdf/kakutid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e51e64-c2ac-4614-9f35-ca7f1378d7ec/wuwazivesideser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cae4cb3-89b6-44ac-abd3-bc811bfdb969/47303474434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91a321c-436e-4f64-b7d9-ca9e834bcf44/sasogaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/kinetico_50c_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/ewings_sarcoma_treatment_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8721/9867/files/50124086369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7108/7007/files/tuck_andress_fingerstyle_mastery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1725/2249/files/21627724855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29e9ce1-1e3f-4b50-a948-9c62f7197fab/mowufumonoluzunazuvin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc59be6c-6c40-47ca-90df-58af87ece96a/8440939100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddff73e7-436d-49a9-8112-bbfa52cf6a8e/fojeziwaxajetikali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4020b62-adfb-4685-877d-67827dfeb867/35246810980.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_off00007434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 5316 bytes
SHA-256: fbc7988be668e4f75382583e38c8e93fa2e740966052022adaed8947c2b88155
font_01_sfnt_off0000861d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861D 10092 bytes
SHA-256: 089aaaa45181a1c48d14779a32356f18977285021574baa593f571a4a890b655

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