Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c989e5a6e6f2e3…

MALICIOUS

PDF

42.7 KB Created: 2020-11-06 14:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: d5734b71e12c0792434420dc1bf2d081 SHA-1: 5912913d340510b4b8700ae035edb288c82419bd SHA-256: e5c989e5a6e6f2e38a73b85c89e159a1d88bcd45785eedc13ca3c3dcf9f8acaf
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://traffine.ru/123?keyword=dion+dimucci+abraham+martin+and+john+lyrics In PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/d6a726f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fa402dc07c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f897d01d6a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417986/normal_5fa03165b1c99.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/xanebavifamopez/also_sprach_zarathustra_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/jovagitagonopubovoposij.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/36878015912.pdfIn PDF document text
    • https://s3.amazonaws.com/bixumiburi/witakanumuwopaxuna.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/tamitujagojabodadif.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/maytag_bravos_washer_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/49244596974.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/gumukivi.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/11287421254.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_off000066b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B8 5496 bytes
SHA-256: 6afbb841d6b56a2aca843cfa336f8221fbdd5268f6ca93e48b156d7bb5c16ea7
font_01_sfnt_off00007946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7946 10760 bytes
SHA-256: bbb00a82693c4d21fba191a8c77f0ea85309c1979271931e1f7c2ee66e7c7bd5