Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8dc34c51cd4cdc…

MALICIOUS

PDF

44.4 KB Created: 2020-10-05 15:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d70ccc17680069d8789694dd4d40d7fe SHA-1: b39f4c848445feb7bfc4d84b447a24c1b3bfcf92 SHA-256: ad8dc34c51cd4cdc5fff949eec320d5dba59d988a20737a101233807a0b45392
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://ggtraff.ru/strik?keyword=paper+doll+printables+and+clothes In PDF document text
    • http://files.ie-proaudio.com/uploads/1/3/1/4/131455337/1140044.pdfIn PDF document text
    • http://jetidituf.iowasubtleimageryphotos.com/uploads/1/3/1/4/131453574/kivinip.pdfIn PDF document text
    • http://xigar.your-bali-driver.com/uploads/1/3/1/6/131637255/xufagozozu_fovubefe_zosepunum_sidezijari.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/9ad59792-a640-410b-a820-3d1030477868/mupusop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c5deb3-5ba4-4b4f-913d-c65cfe67fed3/fugiselixumiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa227b16-3a25-47a4-a1d5-cabfd698a47a/jogofumotijabomolajoxira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/807d5cd8-b9bf-4001-a6c2-bacf82eb6da8/47077053087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd82acc-272f-4dae-bf5f-bfa9494cd2d4/lukifexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02233800-3f52-42ae-9507-af92a0b3db64/vusejufetegaxabakeboxoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43c03b9-1e84-4196-a75d-22833a471eaf/gujejafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b7c4bd-e52d-432f-8f6a-89af1134b7b1/zobusamutoxakunodokigot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681d26d4-3e64-4cd2-98c2-8cd45007cc7d/57289556837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8405c68b-9c1f-472c-a071-f9e2ee3d8e9c/66506699110.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_off00006ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 5300 bytes
SHA-256: 5f65962f6d420dc171e4fc37c4d54ff7859875aea6bb99d2146f8b3aca497ba7
font_01_sfnt_off000080e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E9 10540 bytes
SHA-256: b0c7ead84b013c1c3ab8a92e1852e8f6ed48f7b4abaad6b9f5a86decf16fa652

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