Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f629a621768a562…

MALICIOUS

PDF

50.1 KB Created: 2020-11-09 02:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: eec6453a07ac0131a4eccbb08fb391a9 SHA-1: c354453a9cdacfa77e592eba35b4ff6df600329a SHA-256: 6f629a621768a56291259dedefa02273497d7004f5e3d78d2c5d61da3cb3199b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=five+nights+at+freddy+s+mobile+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f9b9a1c3714c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f89b54aeda9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f877ac84aa5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f9dd819063e6.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/24a009b2.pdfIn PDF document text
    • https://bavawodefa.weebly.com/uploads/1/3/4/4/134445913/jabiz_motodi.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/edda255b-2412-4d01-99ef-9443dfe63944/59067718283.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/wiwejojujid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992b38fc-a28f-4da0-8942-b6df6242f6fc/76231489812.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/xatoxevasaxomilatajukam.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/lalekepasama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8729bb05-2b8d-40e6-a464-4d7183c6ab0b/56808641204.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/fufekeguwafikamajepafipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c73c5e-1f68-4299-84d6-c9aee58ac2a3/54393288361.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/42035313659.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 5776 bytes
SHA-256: 82a746450e7835054ef7603af61a0f556eb55bb4908a8f00182be2421a020b34
font_01_sfnt_off000075c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 2140 bytes
SHA-256: a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
font_02_sfnt_off00007f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 10648 bytes
SHA-256: e907cbf6f45205b8e240bae333b2bfb7c39a24e8e05b90f3a6a2644ee3607d10
font_03_sfnt_off0000a43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA43D 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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