Malicious PDF — malware analysis report

Static analysis result for SHA-256 5676d0f25899a453…

MALICIOUS

PDF

72.9 KB Created: 2021-02-12 18:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0d704b1516e84b1982deb4ffa1ce4837 SHA-1: c4e2ab3c60b83d4180fe31d2f08539116778a080 SHA-256: 5676d0f25899a453223b25db1a4255d89febad68d34dee6c3d03867597cfcf73
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=tria+granulator+manual PDF link annotation
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/3355800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fdad34b113ec.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/hiPUQii/92340790319.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/iUJihjc/pac_man_world_2_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/9O2Kvy2/81930764400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_601c5d3a0ad8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_601c5c5e1e158.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/dhe9LH1/tulenadadixiguf.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/ihbeugj/wugegapubalavufiguxo.pdfIn PDF document text
    • https://movediwifed.weebly.com/uploads/1/3/2/6/132695881/nopefev-lowuvitu-rerezekopax.pdfIn PDF document text
    • https://dogodomob.weebly.com/uploads/1/3/4/0/134017369/2371498.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/PjjM7ig/47037570029.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/fadupazageraf/89801367876.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/mexog.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/81001806244.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/appvn_android_english.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_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 4776 bytes
SHA-256: 823129f6f514beaca2cb11c7a81e8981efbef490d13ca5bec7b554ddd4f1726a
font_01_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 10264 bytes
SHA-256: 8962f34c1b4b168b26436bf24213b7390c63d6c315f471fa0264739f90f1aca2