Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae985cf431c93cd…

MALICIOUS

PDF

64.4 KB Created: 2020-10-30 15:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: f4392920a4d868a3617e0e88b3164d9d SHA-1: 1afe0960cbe6970b3299b16813f3862484bba4c7 SHA-256: 0ae985cf431c93cd7bf61973dfc1511044eab792e11efc6e9ad372b7578f224a
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://ttraff.cc/123?keyword=asus+11.6+laptop+e203ma In PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/lerapik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8708d6460b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f8b57c696b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_5f9b65c4af343.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/d0482d7f44c9d8c.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/puluxa.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/limewub/54602323881.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/36198237197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f15d595-adb7-42d9-843a-133342dd104d/24253214640.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/stay_hungry_stay_foolish_steve_jobs_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e03449-714f-4761-8f2b-b7878d6b8f35/como_programar_control_universal_rad.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/supuxuzewopof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca6b23e-10d3-4e3a-9c20-07b7f137178c/95701363193.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/xedelo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA555 5532 bytes
SHA-256: 267ae7d23b3ef563839bd06ebf62394f6db9699600ba71bf48fcc8c8ca6d17f8
font_01_sfnt_off0000b81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81D 11564 bytes
SHA-256: ea0a6a423cc098b2d1cc719e79883704c69ceaa9333e334a52f067e494d6f5a8
font_02_sfnt_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 16136 bytes
SHA-256: 36abefe30a8cca52becf2d3bfe0d373c905c997ea1a72d737b5d2b25e28c6092

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