Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71c60b34bb00968…

MALICIOUS

PDF

41.2 KB Created: 2020-10-08 14:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 446cd7eb58ae1fa2c2d62e45ff3527da SHA-1: 6e72176234b7d4d5e1e84f4f952f8d5ea57ba273 SHA-256: a71c60b34bb00968ab9fbca7b9a3ae6d6a6e257e140604a103021e53a3a135a7
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/pify?keyword=chistes+malos+capitan+america In PDF document text
    • http://files.felicitystevens.com/uploads/1/3/0/8/130874587/6146981.pdfIn PDF document text
    • http://files.malianderson.com/uploads/1/3/1/4/131407181/3845250.pdfIn PDF document text
    • http://files.millimiracle.com/uploads/1/3/0/7/130740625/tusok.pdfIn PDF document text
    • http://kadibe.erotickookiekove.com/uploads/1/3/1/8/131856725/7861334.pdfIn PDF document text
    • http://files.computerscienceatschool.com/uploads/1/3/1/4/131407226/632082.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/d0617411-90c6-4116-ad3c-df88434190aa/21228956099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473fb473-a429-4807-94db-408e750e1551/99121381124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2faa681-e8a3-4db4-9357-d4e3a2025c65/zirikopenakelojodapusedap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ce05b6-4891-410c-ac6d-a10952d66314/rijabavubaregararepugep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb7a3ad-863d-47f3-b0ef-6ee3e99968cd/sojabokoxevafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057cfc01-927b-4074-bd2c-ab8d8f9d8ee8/25777493424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a5c852-05ca-4113-90d9-231951ab1548/netatexuxegipudamexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4447/3494/files/national_african_american_parent_involvement_day_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/hey_diddle_diddle_nursery_rhyme_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/caltrans_construction_calendar_2021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/naluzoporimeruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/kexur.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 4

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_off0000649a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 5076 bytes
SHA-256: 5ece1308f2e9fbe7db20f73f194519ae8da82106586e423529142a0908bb4eec
font_01_sfnt_off000075a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A8 9928 bytes
SHA-256: 73f23969503cf94de6499cd86c253620679f64b1f2628c869d3272c8750ad8e3

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