Malicious PDF — malware analysis report

Static analysis result for SHA-256 326edf3fae2517a9…

MALICIOUS

PDF

42.2 KB Created: 2020-11-09 13:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: ea9535b501ed9deed74a0ebd2a5c37b4 SHA-1: 12b14dfc3dd706adc8c5056d983fde5a4ddafa7f SHA-256: 326edf3fae2517a9224a2d58fccfa82f3d23ff4bd8baadfecd3e744703193730
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://traffine.ru/aws?keyword=4+chan+safety In PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/9a70da06f84bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9132a427fd2.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/wodabaxazugiwafab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunojipu/35199728634.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/ancient_aliens_the_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/starflight_genesis_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/87042130988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818b548d-938d-4860-ab57-f0476f6c7e1e/online_clash_of_clans_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/60995648270.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/inflected_endings_video_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/62159547233.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/nitecore_intellicharger_new_i4_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80485930-7277-4ace-a8c3-2ecbbad12491/singer_1507_manual.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_off00006851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 4936 bytes
SHA-256: 2ebcd0801b44047948d166e7f473daabd7122ee4f68211e83348803049d483ec
font_01_sfnt_off0000792d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 10356 bytes
SHA-256: b512b66d0b9dd85b8765fd6487348a974e347acac61c3ecd3d74b95bbd8dce63