Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a059d2690247e9…

MALICIOUS

PDF

44.0 KB Created: 2020-10-16 09:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 605440fb33934faeddf330849fd74d55 SHA-1: 1ad7eb90ed501cc0f5e1c0d42e245db7d699027f SHA-256: 87a059d2690247e9b61b35269c9afefaa6986260008509b5bd54dab3154bfa06
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/123?keyword=briggs+and+stratton+service+manual+pdf+free In PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/09f15.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/pukamegipugav.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1e0bf38.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/4277333.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/2d658bc19458.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/8414347.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/1/0438/8998/3643/files/digiprog_3_manual_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/vhlcentral_answer_key_spanish_2_lesson_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4298/6903/files/tom_collins_rent_actor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9191/3624/files/lirr_map_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1384/8219/files/nezumaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/kituweluroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68399179-4991-4fc5-9318-7acdea087e9e/megedumajivefiguvoniki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39c57f8-7471-43eb-84f0-ece3478b7e4c/pozifomekafizuraleg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c541b3a2-00c7-471f-89d8-725a2323d73c/6640335536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee9717e-5602-471a-8a73-35dcf454c6f8/ruzorixukux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5267cd30-9ccc-4384-8a79-bf5ecb34babb/16663655343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9150/2269/files/pat_sajak_grandchildren.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8943/5064/files/electrodynamics_grade_12_questions_and_answers.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_off00006bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFE 5584 bytes
SHA-256: b2a25504242801e43d8e5c9912a5057bb9eef06ac0150eb84d080bae0d09afb4
font_01_sfnt_off00007ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE9 10528 bytes
SHA-256: 01eba276aca6d921c58c9dc2ab295f2720f318bea3a3f52044f95248b5bee8af

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