Malicious PDF — malware analysis report

Static analysis result for SHA-256 453a16411050f16b…

MALICIOUS

PDF

46.5 KB Created: 2020-11-07 22:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a346b226069d9b036631dfa4606be09b SHA-1: f4b16d2ed0c104794fd7a6a6e75ca2cb1b0ef4bb SHA-256: 453a16411050f16bd90a0b4a60767107080bf1bbc9f4ec500511374a7f7b3ae3
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/123?keyword=bountiful+high+school+class+of+1961 PDF link annotation
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/keruwab-jowovalab.pdfIn PDF document text
    • https://tadeganerusoza.weebly.com/uploads/1/3/1/4/131438541/zasewigogafilozugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5f90121013437.pdfIn PDF document text
    • https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/dobivafe_kifonigux.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/aea49.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/vovabagubajegeb/53349185117.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/nodibowogawir.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/am_technologies_poland.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/samsung_galaxy_s7_edge_unlocked_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/north_scott_high_school_choir.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/10_branches_of_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/1-99_smithing_guide_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/sky_factory_4_starting_guide.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_off00007527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7527 5460 bytes
SHA-256: 8f120dadceb3890eee262c2585750ee88921f2deabad7be616dc151f345ef756
font_01_sfnt_off000087c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C6 11944 bytes
SHA-256: acd04b11baff71dc12d06e386ef18eb2badaafbc9a74eb98c41639b4b69e81cb