Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf06dfb5a93cec0…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 18:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 117d74bc06ece931c2f0db0330effd10 SHA-1: b5f5011fbccd93f8399939e71c0ec830231eb218 SHA-256: bbf06dfb5a93cec097836f8dd4b59d69e376ad4668759957a726cb52813af489
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafficel.ru/123?keyword=cedar+rock+park+nc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424982/normal_5f9c47a5e3c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5f8bb596a477a.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/tumomeseke-wepebipodimabid-falonezifo-vasunejebemetiv.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/3951396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5fa181a37ea56.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/resixexi/fojuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/98164034522.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/gapekenogaburuvefavefera.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/easy_copy_and_paste_bee_movie_script.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_off0000625a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 4824 bytes
SHA-256: 48085d075843c8a0deb52c6bc99ea45e255781fb5b2cb3a9cd1c0fd8e8d59ece
font_01_sfnt_off000072d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 10904 bytes
SHA-256: 724079920c3364c573f65cc85cfc275b34afb835ff38f76b1c7d278b8c880846