Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3316126983e936b…

MALICIOUS

PDF

56.2 KB Created: 2020-10-04 00:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 99676b59aabc63ced1213515beb24c48 SHA-1: 71d1886568619562a51aee2b63a7b1e44e5a3ce8 SHA-256: c3316126983e936b552683a548b9e79b90921bac95f49679f2660f7972c75df5
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://cctraff.ru/strik?keyword=kenshi+hive+recruits In PDF document text
    • http://files.descubratextosinteressantes.com/uploads/1/3/0/7/130738762/4087418.pdfIn PDF document text
    • http://famajoxu.whiskyfete.org/uploads/1/3/2/7/132712019/witupelovexorov.pdfIn PDF document text
    • http://files.altrimondifirenze.com/uploads/1/3/0/8/130873717/f1c167b169fbe.pdfIn PDF document text
    • http://ginegeb.marshfarmpitney.com/uploads/1/3/0/8/130874600/supezuroguvod-zizipil-bogonider.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/botozamajogalotaj.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/rixusojuzis.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/1d431d95-fe80-4cea-b404-e022d4c7a135/lulof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af6e34d-2e8b-4aa4-93ba-4d3152fb4059/gamilamijawajojape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8583/9003/files/growing_gardens_portland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3791/7084/files/kanawha_county_school_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5987/4454/files/neuron_function_pogil_answer_key_ap_biology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/paul_duke_stem_high_school_teachers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3252/files/how_to_mod_battlefront_2_2020.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_off0000a154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA154 4672 bytes
SHA-256: c86a6d1e7a0d423d48a15d8417123cd171edc1e94ed950ce3bd8cf892100523c
font_01_sfnt_off0000b146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB146 10352 bytes
SHA-256: 266b4c157b75fb62cd2d8729377a64e35388a793fa6f63fb95fa3cfcd6677f47

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