Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74b2b83c036be92…

MALICIOUS

PDF

46.0 KB Created: 2020-11-03 01:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9c989ee049064f5f331f298ffbf42cd6 SHA-1: 1b8ba3399bbe9598ba12dda5e7524e566e07aaa7 SHA-256: e74b2b83c036be921d32cca7a97af648688b853f6a4a959eb5540e69a98cc156
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://cctraff.ru/aws?keyword=apx+alarm+manual In PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/binuzepanes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f9a23371be9d.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/jufixobevexoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f878a1905cf6.pdfIn PDF document text
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/tosepuxade-merobudatunuv-tomajomer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_5f9ae902e3573.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000790e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000790e.bin)
    • https://s3.amazonaws.com/vavale/ny_primary_election_2020_absentee_ballot.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/mere_christianity_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2624/2472/files/swtor_scoundrel_scrapper_pve_build.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/psychology_third_edition_schacter.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/encyclopedia_judaica_vol_22.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7808/3248/files/vamokaremosota.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 extracted file (font_00_sfnt_off0000790e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x790E 4844 bytes
SHA-256: f9ca09937ef2e55150925394c66b47ca40fa992cc3ec976949c7c72b11fe7a4a
font_01_sfnt_off00008978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8978 10116 bytes
SHA-256: c643f8ab2bfeb34954e1b567cf76bf293d729b003ae4bacdb572d14a32643622