Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b57bf08de62d0c…

MALICIOUS

PDF

34.3 KB Created: 2020-10-05 03:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4e4c2fd4e60f97150a3473ab73df4167 SHA-1: 9a18bc9ba6f5feea0a4a7bb4c5ddfe9596fdef77 SHA-256: 44b57bf08de62d0c3ea6ae5821674e4223673ddf7ed3d5fa8c261eb6199e154c
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.club/pify?keyword=unblocked+games+66+ssf2 In PDF document text
    • http://files.plantiful-mama.com/uploads/1/3/1/1/131164573/dazezazuwusu.pdfIn PDF document text
    • http://dakebe.ourladyotl.org/uploads/1/3/1/3/131398064/2620606.pdfIn PDF document text
    • http://gobulo.ywcahealthandfitness.org/uploads/1/3/2/6/132681481/d3d4075199.pdfIn PDF document text
    • http://ludavef.harpoonreview.com/uploads/1/3/1/3/131379182/xujuxawenofo_jaledidi_gigenuvul.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/428f0ca4-27a4-4504-804f-457448157fca/53716597797.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4c2bcf-79e9-4b13-b3cd-8d7f4797dd70/beleka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02405fc4-ba07-4e9c-8aca-12c124068349/minirida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950b71b4-d2b8-4571-af78-363187fea50f/xisixejojosujat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9669bfff-9287-4697-9410-b769ea096898/34800832966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e400e4-2bb5-4056-9b53-c1528729bbf2/funerimuwudug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d25dcfa-1260-4883-9bde-e2caf64d48aa/8359710763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ba0e97-22ee-4ecb-92c7-0c9094c64595/20887951670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117dbd6c-5547-4ed7-83e5-5c6176bf79e3/bijimosanatafodokixu.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_off000047d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D8 5728 bytes
SHA-256: 9f495eda864d53b0461dbeaa7382839333bf5fa41d31db5aff66e1d72d51b61c
font_01_sfnt_off00005b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B56 9696 bytes
SHA-256: a6a18703d9dd5ffeeab54845ab09b5c04147dec4320120624254293a46193444

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