Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f528faf810d7eb…

MALICIOUS

PDF

44.7 KB Created: 2020-10-26 00:23:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: dbe5c07283821e1bc7784d9e08009a6e SHA-1: ce20a6c8739e41c429c599c021075fdf7e7c0d72 SHA-256: 52f528faf810d7eb9e943e32bde27d3a8ade5696cdf7d6b347331d33b26b31e3
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/aws?keyword=arduino+projects+book+starter+kit+pdf In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/rigelepaximot.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/9642659.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/jumuvoxarima.pdfIn PDF document text
    • https://taguraridefukal.weebly.com/uploads/1/3/4/4/134446716/jinaxexudop.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/f4cd92492c37.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/2108275.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/simumuj-novobe-zugukug.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/77af1846b7b45d.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006ee5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006ee5.bin)
    • https://s3.amazonaws.com/pisik/karen_blixen_babette_s_feast.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/dazokipabuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/zajululu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/5077646844.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/english_conversation_lesson_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/46813209983.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/the_babysitters_club_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/4574061638.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/gotofekuwebipe.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/netogijovegetemakibumu.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/assignment_problem_in_operational_research.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 extracted file (font_00_sfnt_off00006ee5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE5 5388 bytes
SHA-256: 048f360f3374dfe520f278c1a3f30323d152c5f0659e9dc8eff90d8f4fef051f
font_01_sfnt_off00008145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8145 10536 bytes
SHA-256: 580f42d815510043194b109e532569b7a81bffb2f235da4a24ef39a509f31976