Malicious PDF — malware analysis report

Static analysis result for SHA-256 624165b2ca385ec3…

MALICIOUS

PDF

45.5 KB Created: 2020-07-13 11:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 06aa942864e92ae2aa19bf00dba45f94 SHA-1: 9cc6284e5de458c9f58849a2cbb80869d69b57df SHA-256: 624165b2ca385ec3111fa2394966a9a36d219c2bd6190c48cec7d9e2e3614617
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://ttraff.ru/pify?keyword=rabbit+proof+fence+study+guide+pdf In PDF document text
    • http://files.victoriawindowwashing.ca/uploads/1/3/0/8/130814329/nozolupik_guromogi_dutume.pdfIn PDF document text
    • http://files.bhlexvolunteers.com/uploads/1/3/0/8/130874539/7bd20.pdfIn PDF document text
    • http://files.lydiamccarthyart.com/uploads/1/3/0/7/130739522/mapegeriliredepubaj.pdfIn PDF document text
    • http://files.chicagoschoolofgrappling.com/uploads/1/3/1/4/131409170/312064.pdfIn PDF document text
    • http://files.johnson-family-chiropractic.com/uploads/1/3/0/7/130739782/gexotafa.pdfIn PDF document text
    • http://files.rdpresets.com/uploads/1/3/2/7/132740637/110396.pdfIn PDF document text
    • http://files.stillherethinkingofyou.com/uploads/1/3/1/4/131453053/35365f0eb6dc6.pdfIn PDF document text
    • http://files.blueribbonhomeimprovementinc.com/uploads/1/3/0/7/130776298/pofumuroba.pdfIn PDF document text
    • http://files.heidiwillbanks.com/uploads/1/3/0/7/130775834/8486592.pdfIn PDF document text
    • http://files.verybestfineart.com/uploads/1/3/1/3/131382491/xugunikebusaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jobafabiwoxo.files.wordpress.com/2020/07/kafovak.pdfIn PDF document text
    • https://juzakiwari.files.wordpress.com/2020/06/73891978861.pdfIn PDF document text
    • https://wirebibejav.files.wordpress.com/2020/06/3720132972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/wodedinixuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/64570989571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/54994993397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59526866216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/34013036363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/20541326572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/xotulotofixawimadar.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_off0000732f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x732F 5420 bytes
SHA-256: 4e07c37962e17958ce14e93f73ff5a438262c9fca68517ea3076adde784d04c4
font_01_sfnt_off000085b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 10060 bytes
SHA-256: d76efb0bef3c5f38838b6ffdb924b866ff9db5e816d9a59041373ea887eb1ef6

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