Malicious PDF — malware analysis report

Static analysis result for SHA-256 461c1dd2e54eb913…

MALICIOUS

PDF

54.3 KB Created: 2020-11-08 10:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: c771abfffd0dcdb2bb8d9a5a7470f71b SHA-1: 18405ca70ebd0c11980f47485909443742140d33 SHA-256: 461c1dd2e54eb91324240fc51d88e5114e6fb399bb4bbe090b8bb457e2576324
154 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.
  • 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.
  • 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://cctraff.ru/aws?keyword=hawaii+state+notary+manual In PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/c4c5d2437f97.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/3452298eb7.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/a1d0b0c.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/xakapudakadu/xazemugenemiwiresoxugedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938aa736-f8dd-4f83-aedb-a3e4d6d42046/4715117807.pdfIn PDF document text
    • https://zesokipiv.files.wordpress.com/2020/11/sokuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8eda62-ac62-4366-8eb6-3c35caf5baad/69094944575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22361c22-6cdb-4308-b9af-c57a6a2caf76/world_record_for_google_dinosaur_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199a5ccf-6cd7-4d2b-9596-24c03e0d8133/jbl_loft_30_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c4c93a-be9b-4212-bbe1-d9d6253cb30b/87253741714.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E4 4984 bytes
SHA-256: a6af576da022bd12abadfad60a7dae21c167f905ccc8b605dfafbb433b9ef383
font_01_sfnt_off000091d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D5 10900 bytes
SHA-256: 2e58db6b543d6ca7b360793bb3f86f26bfdba8f04c3a2e851e01797053540ea8
font_02_sfnt_off0000b738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB738 16172 bytes
SHA-256: b29b0bd5ea1dd7b0d0a6cd818d8d8a34292952ee97c829a102a7af866ed22895