Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a66e362e142a79a…

MALICIOUS

PDF

41.3 KB Created: 2020-09-30 23:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3ee5801e135822826a48512385b87cc5 SHA-1: 7b9225e582e0e045bb50e0e9526cbde10dcd2ed6 SHA-256: 4a66e362e142a79a7b7308628d5438d1aa3fdc8be2776d6569c8e97484828148
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=biblical+allusions+in+literature+pdf In PDF document text
    • http://files.planninginblackandwhite.com/uploads/1/3/2/7/132710655/bobuzugipiz_renele_litazafurusagop.pdfIn PDF document text
    • http://mamubiw.shclifeline.com/uploads/1/3/1/4/131454065/8843234.pdfIn PDF document text
    • http://naludo.isawboston.org/uploads/1/3/1/4/131437393/0c41918f3fb.pdfIn PDF document text
    • http://files.breathmark.org/uploads/1/3/1/3/131383380/getowalule_bekenuba_gotipizimimej.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/95620701182.pdfIn PDF document text
    • https://site-1036956.mozfiles.com/files/1036956/gagiti.pdfIn PDF document text
    • https://site-1037169.mozfiles.com/files/1037169/5394158389.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/wezixabufidiv.pdfIn PDF document text
    • http://files.iobcwa.org/uploads/1/3/0/9/130969151/guredudijul-dipepuforawuk-vekewasem-zelipes.pdfIn PDF document text
    • http://bolaba.careworks.org/uploads/1/3/1/3/131383562/redobagogasunil-sefari-gexob.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/1/0463/2490/8193/files/vaxebadufukejumimegig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4678/8502/files/dezijojivuwenod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/journey_to_the_akashic_records.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/9707/2292/files/brochure_layout_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2973/2245/files/delonghi_espresso_ec155_instructions.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5336 bytes
SHA-256: bd43092e550b606dd31a2efa49461b9352c367c069812a4aa2f114d8f8355e06
font_01_sfnt_off00007770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 9668 bytes
SHA-256: 638d54dc200dd0e6ca5abe9e8bdd38b7d99fb813365dfa8a009e39fa93c5347d

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