Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6b6588b6230560…

MALICIOUS

PDF

45.3 KB Created: 2020-11-06 21:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bbabcaa869681ae60f4cab5bddc9d389 SHA-1: 2fd03a4e8ab51bc0952ba9e696df2f5382d6fb52 SHA-256: fa6b6588b6230560a1e5d98720aa84a235656209fd242766d00b7bf91bb382be
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/aws?keyword=the+house+on+mango+street+questions In PDF document text
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/a6612542b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_5fa26521d4427.pdfIn PDF document text
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/6004112.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/1568393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fa36fea998f1.pdfIn PDF document text
    • https://wiwawuvagowe.weebly.com/uploads/1/3/4/4/134496439/rirazom_bugox_resodefuduzogu.pdfIn PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/tetudafebe.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/ca9a1acda9fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8acd8086b6f.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/tarajix/92115118254.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/lizagabibun.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/sojenakiboxex.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/les_precieuses_ridicules_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/csr_2_tempest_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/install_apk_android_9.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_off00006c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 5140 bytes
SHA-256: 0ed28cd70631c2b4ec75845cccbf6f5a8a0406929e8757183cd374d5c54070d5
font_01_sfnt_off00007da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA6 13540 bytes
SHA-256: 281155734276e3708237f18acf6c463a02a0c81958165b7fa85907f8597c616a

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