Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc97cf2847b2b60…

MALICIOUS

PDF

54.4 KB Created: 2020-10-22 09:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8c14c80809591e42e923bd92f7402b4e SHA-1: bcb9773a2f711032de86a83e9e06c3668e063071 SHA-256: dfc97cf2847b2b60f9c46ce062c458634ae912aa53c8adcf4efc6e90bb073d33
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.
  • 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://gettraff.ru/123?keyword=pcb+design+basics+pdf In PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/9844007.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/254530.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/sidubirofip.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/zikoxaxaxezivadusi.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/2176594.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/jirejuxez.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/9823159.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/kugedunaxosasot.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/falojogore.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/3211284.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/9542354.pdfIn PDF document text
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/zekijufe.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/jenefemafawal.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/pazifetanegapu/tetidejegaguf.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/54629469341.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/refigodutobexexax.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/accounting_aptitude_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/80207007224.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/sinakapoxosudepiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/6621463861.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/6978687977.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/biosphere_reserves_in_india_map.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/bipolar_depression_rating_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ba4207-7b28-40d7-b220-5fc97b41c9ba/32352354778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf49707b-3994-47a9-9820-6f79eef92b08/xavutepij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4f7bc9-2dc7-49ca-830f-0fc31fc9b370/mugaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee507cb-7473-424f-b162-ccec0d3b604f/65853921627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637d8462-9e94-4a70-b8c5-0409c46653c8/74788585157.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_off00009604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9604 5336 bytes
SHA-256: 745ff07b7bcc778d8bb87f8748bb5076b6ee1f7b185b9192da670b834215aabe
font_01_sfnt_off0000a838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA838 10512 bytes
SHA-256: c4a49b8ccabf6fbc0e8bebb33c418e5c6cce5a5c9b4b9acaa70fbdd2a1d781ae