Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0974bc2a9d0708…

MALICIOUS

PDF

45.5 KB Created: 2020-11-06 01:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d46f20be1c97a947eb44f3731b6b3827 SHA-1: 3ab2f62bbc9c025529a0b794716ee7d6fb8a6e6f SHA-256: dd0974bc2a9d0708b1068b9d107f4b3dcaf051ccd8303ea0ecb1e5a2b6733bb8
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=music+theory+games+free+online PDF link annotation
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/sileva.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/gedijomojebapigit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gafedupeba/circle_y_saddles_used.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/fnaf_ucn_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/bipolar_disorder_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57ed94e8-4814-471c-920f-63e5fefbb94c/98705986322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e9333e-e029-475c-bc23-f70580946082/pedivufuneforoxekix.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/kepaluvufol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c689eab6-e111-4362-8203-16a4e213e6ac/xorodinexodiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/58572119056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9538cc46-c6f0-4c5b-8c30-b13cb8a61a4d/vubazak.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/escape_room_abcya_answer_to_level_16.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/vozimawotanigavo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/38281209622.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/99506384349.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 5284 bytes
SHA-256: 20b343022686c8ec2a33a373841e5926c9a5e982da92c7b5ed3f05d6b52ac462
font_01_sfnt_off000077c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 10376 bytes
SHA-256: f37938c5cde4b390f34400d3467dac2481b18ccc5cb4542994ae77eb555e6c18
font_02_sfnt_off00009b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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