Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b4329c93b97bc2…

MALICIOUS

PDF

55.2 KB Created: 2020-11-08 16:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 916a2add485586defba75e6c050c3e17 SHA-1: abc7ab3321d69a70b46f7246b9a6ed8b99b52053 SHA-256: a3b4329c93b97bc27ae32d5f9da7148a8277879fd61d0ee23eef0c7086b45734
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • 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
  • 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/aws?keyword=the+americans+pdf+chapter+10 In PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/6631508.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/1004e7e6-f8c9-4f03-a51d-86c2f0c5b70c/philip_kotler_marketing_book_latest_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/94177775855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa6f695-1e6d-40d7-bfe5-7169eb3f3cba/42733364689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8570477a-fb3c-4dc1-ba98-1b74c75c63eb/xiwodewagutanososus.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/the_batman_files.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cd095d-a867-454e-89a5-b6eaac5b778b/levokusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665bd0d0-2421-40ef-9fbd-01189b0c4881/xumor.pdfIn PDF document text
    • https://dosutodusaje.files.wordpress.com/2020/11/tatitapuxazawigotat.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/motejavofozezixivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ae704c-748d-4a5a-9ed6-c2582fe78740/27300649216.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/vurokogovoramowupasele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c99cb49-b568-4e08-922a-c994ce31b95b/32026367839.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/70632909649.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_off00009744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9744 5504 bytes
SHA-256: b234512544be5e25cc053bd275dad2c390dd6d681d4ef7c9cae663b7c7129e7a
font_01_sfnt_off0000a9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D6 11164 bytes
SHA-256: aba90ad6019f629245d6267033c8c76952d3fdb44d5d9d2de3879936adad8b49

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