Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a2fa4bc753d0ed…

MALICIOUS

PDF

39.8 KB Created: 2020-10-30 13:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: cbe6c7eec27f4a0681dee6f13b42fb87 SHA-1: 132aa5448090c32dc9f58d4616c03aa76e25ef00 SHA-256: f1a2fa4bc753d0edd56a8dc20fb7b0803c1a134ab9ec39bb4eedc8846b66b0ae
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.me/123?keyword=foundation+systems+of+michigan+warranty In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5f94f4a7b16f2.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/b7cc46be1.pdfIn PDF document text
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/2979126.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/bofimumajotut-gigur.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/subud/doh_health_calendar_2019_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/lovumejurukafer.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/4755373172.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/quality_assurance_pharma_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/gemafubew.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/fixing_a_hole_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/ziganajam.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/bangladesh_map_file_download.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_off00005e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E31 5552 bytes
SHA-256: b1f2786f193d29fcc9dd341ec4dbe5ce32b2386778b8052778385543a617dd88
font_01_sfnt_off00007101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7101 9748 bytes
SHA-256: fca457abd5f36e546893de72aea5c0420027566282e1c7a401a5b7839566a1b3