Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a46b7f9db62843…

MALICIOUS

PDF

34.8 KB Created: 2020-09-29 22:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e566435436ed793ae45f48adf3270505 SHA-1: a80bf97db2cec529680de5bf71e70b342b1c68d0 SHA-256: 96a46b7f9db62843b1a1dcf87ca691fb99ef99ccdeb593d6344e09d421c5cfaf
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=bidart+campos+germ%25C3%25A1n.+compendio+de+derecho+constitucional+pdf In PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/pawiwozuvuvofezake.pdfIn PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/11885347917.pdfIn PDF document text
    • https://site-1037274.mozfiles.com/files/1037274/foduzoronilo.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/19041038502.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/38068861465.pdfIn PDF document text
    • http://files.local598.com/uploads/1/3/1/4/131438741/kaxutidupotekofirob.pdfIn PDF document text
    • http://files.wanderingpassport.co/uploads/1/3/0/7/130775628/3114822.pdfIn PDF document text
    • http://files.espacepilates.com/uploads/1/3/0/7/130775897/sadivuve-fusum-vataxirukefesum.pdfIn PDF document text
    • http://files.lavernemleonard.com/uploads/1/3/1/3/131381946/vuriwer.pdfIn PDF document text
    • http://files.walnuthillsupc.com/uploads/1/3/1/4/131453522/guwajekesowivug.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/1/0433/5170/3706/files/mcdonalds_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/algorithms_to_live_by_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/2013_f150_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/mejexarad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/the_death_of_general_wolfe_was_controversial_because.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_off00004463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4463 5884 bytes
SHA-256: 0ca42c6957221d2c30da71af8def7e05b418f9ad4ebec64663fcd0b76b2da1b3
font_01_sfnt_off000057b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57B7 10952 bytes
SHA-256: 60fea8a690ecb4123d65f33c2ccd842e35e44be42aa611c0cb8701eb1488cc96

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