Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1e343f5d84e9fd…

MALICIOUS

PDF

45.3 KB Created: 2020-11-07 22:11:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ecd16a75a247b15ea99af7dfc20fbe88 SHA-1: 1f7271639363404b61b8f6bbf42d19b3d7fa6e76 SHA-256: ad1e343f5d84e9fd72bae19d95f17006ddc6644d7171077faa71ea7864cab8ab
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://trafffi.ru/aws?keyword=revised+uniform+limited+partnership+act+1976 PDF link annotation
    • https://jewuvasoseximu.weebly.com/uploads/1/3/4/3/134355154/roniguxi_xetujuf_wezekirodovoxap_tokem.pdfIn PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/8738440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f9b8bb22e30f.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/luresimosip/mercruiser_service_manual_25.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/briefcase_allowance_dopt.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/34347442828.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/70868243551.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/autodesk_inventor_professional_2015_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/alcohol_units_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/vatevuxamukinun.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/20348572749.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/89062174408.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/59884725852.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_off0000727d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727D 5904 bytes
SHA-256: dd8c3e13e5798536c2209dfbf09c430e4ddce1057cbcae6c69f7d45b8293ca6e
font_01_sfnt_off0000867c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867C 9832 bytes
SHA-256: 703c61a1d365a83ff61a694db816cb3d3b4b43d3a6522ca061115a9eeb9bc46b