Malicious PDF — malware analysis report

Static analysis result for SHA-256 438f24099aed306a…

MALICIOUS

PDF

42.6 KB Created: 2020-10-25 17:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: e1a62933b1fcbeab0ca2433066f985fd SHA-1: 46e6d70c35243bed03470c530126f1c03d504079 SHA-256: 438f24099aed306aa8857bf837e18430aa8c46b1f2e34872d27a7f0aebbe5655
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://ttraff.link/123?keyword=manufacturing+consent+book+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f8f307b6e69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380210/normal_5f919b883926f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f924d0f86525.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/vitik-gebewanav-veteranurov-tupofezawibija.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/saganan.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/zejaguniniwuxisomip.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/9d40084.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/busaf_sekegezorabi.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/fidefofudi/sosamide.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/wabi-_sabi_for_artists_designers_poets_philosophers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/lozikoduk.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/brachioradialis_stretch.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/fidamogesopawoxujuzedox.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/capitulo_baleia_vidas_secas.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/english_reading_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/rojarebuvav.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/barrio_bravo_libro_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/veginaxizime.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/fotozepakusojibe.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/amisom_mandate.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/emphatic_pronoun_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/business_plan_financial_analysis.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_off00006796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 5500 bytes
SHA-256: c0ef7c0a46f89ab2828cdbdb1c0683d54e1f5884b7f0029a8d2c1b50164b21c0
font_01_sfnt_off00007a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A58 10272 bytes
SHA-256: c989aaac860279a1d7e2b7d07ecfba34de9726e456a990f4f7911433ed09f72f