Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdc880cf5a46b8f…

MALICIOUS

PDF

40.4 KB Created: 2020-11-06 08:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 4b3f0bb34a35b32f7ac89502c1de9767 SHA-1: d0d62cf50b5077d21c1de3e992b22f7121cfa73d SHA-256: 7bdc880cf5a46b8fa24a5154681d84750f4472c4f308a3d841aa31e9a1e133d7
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://traffking.ru/123?keyword=card+games+free+online+unblocked In PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/xijapadulavawivut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f90e76c76456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f8e437d593ef.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/8f5d941f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f8b6da699a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f8fae7a1ae2c.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/zuxizakabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5f9538f8d4e5d.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/fibesezati/viduzobogafo.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/what_happens_during_anaphase_b.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/calendario_juliano_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/kiweravotafikozutikotibaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/12659534677.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/intruder_combat_training_2_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/angelology_books.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/gerard_de_vries_bruno_latour.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_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 5452 bytes
SHA-256: a340e35087292f03b5447d463694ce760176672b6ed826b2790544e4c1a5adcf
font_01_sfnt_off00007247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 10060 bytes
SHA-256: 6040d82278238a5c712b8f3f2400241b3affc8194e955d99d2948318aac75dab

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