Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05325309768d08c…

MALICIOUS

PDF

34.3 KB Created: 2020-10-03 01:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: efa35236b4bb2fc3899796726255f397 SHA-1: dd7b4f462b43cf2996bd242977fc3c429d0d9446 SHA-256: b05325309768d08cb0c7d94ea1eae42952d8fd0cf69f2adab3ac34a2a70eeae0
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://gettraff.ru/strik?keyword=a+thousand+years+christina+perri+mp3+download In PDF document text
    • https://site-1039149.mozfiles.com/files/1039149/jevojuxudiwotojeli.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/poponafakabadopawo.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/6743836021.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/rawafugiraku.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/vosopodosibe.pdfIn PDF document text
    • http://files.legacyhealingretreat.org/uploads/1/3/2/6/132682659/lifefonutugiwufulit.pdfIn PDF document text
    • http://files.aulternatives.com/uploads/1/3/1/3/131381679/1234401.pdfIn PDF document text
    • http://peviwuk.andreserpoosh.com/uploads/1/3/1/8/131856077/wavusogopapufim.pdfIn PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/55415157916.pdfIn PDF document text
    • https://site-1039226.mozfiles.com/files/1039226/nimikuwugose.pdfIn PDF document text
    • https://site-1040208.mozfiles.com/files/1040208/jibabukifuxuvur.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/namiporigubuwu.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/1/0431/0859/7927/files/99445353635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/xazireniwosafum.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_off000047ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47AE 5660 bytes
SHA-256: eda3583c57efbce8a4b96a434681b26dddde6b47161d65177ff5e24d2e5b2faa
font_01_sfnt_off00005adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADB 9700 bytes
SHA-256: 384c0a1b848ddc0605742f5e6a54d7fbcade25434e7266328f0a2bf24723d778