Malicious PDF — malware analysis report

Static analysis result for SHA-256 294624547d186df0…

MALICIOUS

PDF

46.5 KB Created: 2020-11-08 11:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 60315a7ca1cb5c641c95bae29c59e99e SHA-1: 2493e297ebee14b1e940553419199904d7184410 SHA-256: 294624547d186df0abff82fe255adc47bcb927d7c6b52404627c00c1cdbff918
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=civil+war+reconstruction+worksheets+pdf In PDF document text
    • https://patodenum.weebly.com/uploads/1/3/4/6/134657208/babamivaviji_fimuw_nuxipinezopir_lorikonu.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/fab38c5b2a72.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/gidibesuxi/sakonubizexirunosujozadij.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/6186458776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7168b1c-73e1-49f5-8f17-e8bd1aa839eb/vuroko.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/yu_ling_liu.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/91531331816.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/pennswoods_classifieds_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42469d4d-0978-4e6c-89e4-20989b312e17/94445504336.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/97320344566.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/gebegepixepefipe.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/24863094159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf75898a-65ea-4ad2-8cc7-722481411268/pomewinagunowedabil.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/1457414643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a9f371-4780-4d49-8aa5-defd83b3e1ca/25422455590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a61db1-0b65-43e5-90b4-a39836d21a9c/retumegopof.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_off000077d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 5364 bytes
SHA-256: a67c038bf7db2f253d70a437bd9df3ea5787492520237555a5626acb34314d88
font_01_sfnt_off00008a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 10320 bytes
SHA-256: 1f0eac411a7407ff2eead10ff6302055f7d5868caa4cc409fae86314b6fc9148

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