Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0aabe085af641d1…

MALICIOUS

PDF

50.4 KB Created: 2020-11-06 00:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0472f2415eefeae5475b53d32aa3b3a3 SHA-1: 1e9247fc2cf9e6a8651b59a32dbf0511aa9fd577 SHA-256: f0aabe085af641d1845b8d8f8ca705f3221d0bab6b1665b284494659bac4d81f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for malicious purposes. The ML classifier strongly flagged this PDF as malicious, and the presence of a callback phishing lure heuristic further supports a malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafffe.ru/strik?keyword=mr350r+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f964ae614545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f87019fb48cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f9268041a3cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461211/normal_5fa1f874b7a26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_5f9eb94f126f4.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/31c57b30-6d00-4335-8a37-94ad19dec0a5/cigarette_electronique_jwell_problem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c054a6-9a84-4423-8359-aba91c607d40/bill_burden_elementary_staff_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025e23c6-5e41-46b9-97fb-7333907478db/48965388329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc4935a-20b3-4e31-963a-8c39b9c98dd2/a_streetcar_named_desire_blanche_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff654db8-b460-4b50-801c-471f7384ec3e/rofunesixasovasidibeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dece4b9-6c67-42f4-93a6-f5c46eb5c593/73017329184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c08e07e-9b74-4d88-8aa0-759a28779b91/jofuzewumowuxarasigizat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21586ac-b74e-4b70-adc9-db57f6ee9789/50088894813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2876f244-b0d1-4e4c-bdcd-d8824993b24c/bejoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38a83b3-d074-46c8-a87f-d61f348bfc57/82092325711.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B4 5444 bytes
SHA-256: bd06fbb9dc7e7fa4e085d7f7de712a446c90d98e363f16f5a36d4c03abb00bf8
font_01_sfnt_off00009732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9732 11048 bytes
SHA-256: 3b2ca74d4151c06c062b6e2ec3bc001da3ce3e8e9a75da27e534e618a18e7608

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