Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e271ff21ba98ea…

MALICIOUS

PDF

38.8 KB Created: 2020-11-07 10:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: c414441167f27a7cbda63336192950df SHA-1: 2a6a6b7c45758fcaa4facde7862762ce65f2a1d9 SHA-256: a5e271ff21ba98eafd69a7aebdccda54c054ab891e4830c7c045e02a90096857
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/aws?keyword=66+unblocked+games+sprinter In PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/zawaxuwo.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/jazofi/kofurobeserigakuwuvajasaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/dezuxelakusurotadov.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/91949135690.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/bsf_study_schedule_2019_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/nilizupadasosobum.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/ks2_maths_problem_solving.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8652429-7b2a-4179-ad56-f63a3e8d809b/jixuzarevemuxijirut.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/violin_bow_hold_type.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/63135450159.pdfIn PDF document text
    • https://jazefev.files.wordpress.com/2020/11/download_emulated_memory_card_nintendont.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/sasoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/79005988659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3112a2f-92bb-4a0b-940b-734b83a6fef8/used_cars_in_lynchburg.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_off0000568b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568B 5656 bytes
SHA-256: f0b95d2ec2dc27441c658f43b1306026acc61eef269dd27119ca77b45f1db49e
font_01_sfnt_off000069a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A6 10648 bytes
SHA-256: e80430a6617a9396ba2a08527197b0c0597135a43ec1c7aa7f9ef863ed748d7f