Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0442af6b58782b3…

MALICIOUS

PDF

42.8 KB Created: 2020-11-08 15:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 17f2e0b57daac30b7993b97c2c798517 SHA-1: 703580c73a914cad7aacf6c75c702bbbe1890573 SHA-256: f0442af6b58782b334ba5f31c5cce4d387f109cb700be1d9d8ca951bd9aa209a
194 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.
  • 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://traffking.ru/123?keyword=hayestown+avenue+school+danbury+ct In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f913c98d3db3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fa37d73d6a4b.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/vexosafugunu/mimivodot.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/download_palavras_cruzadas_coquetel.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://mozedibeja.files.wordpress.com/2020/11/agriculture_study_material_for_compe.pdfIn PDF document text
    • https://jizilid.files.wordpress.com/2020/11/43959696884.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/amortizacion_de_prestamos.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://zogidadovo.files.wordpress.com/2020/11/6483423632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60ca1d0-77cc-42e0-8920-b07416b3b9aa/nupefowagotuxerij.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ied_study_guide_answers.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_off000058fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FA 5216 bytes
SHA-256: dcc2242bf9e0606f607f940a56e2ef33021bc2617638d48e6d07f726f72428dc
font_01_sfnt_off00006ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 10940 bytes
SHA-256: f00750ea02d1434a1731702accf396c4467814d7048e6f45393a8cc9a02bf640
font_02_sfnt_off0000904e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2