Malicious PDF — malware analysis report

Static analysis result for SHA-256 695e71f3554ea173…

MALICIOUS

PDF

43.4 KB Created: 2020-09-10 07:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 67f3623da683c48059b358b74f6f71bd SHA-1: 681b69e9596ebb267d41eff1911b6c84d37b48fd SHA-256: 695e71f3554ea173907073a2d09ed7e39922fbf2bf409bb99da652078c8f11a5
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.club/pify?keyword=bihar+tet+exam+syllabus+pdf In PDF document text
    • http://files.amybrycewatercolors.com/uploads/1/3/2/7/132740399/7228992.pdfIn PDF document text
    • http://files.eslbioscience.com/uploads/1/3/1/6/131606228/soximejosuwawo-gumewok.pdfIn PDF document text
    • http://rumima.writerscircle.net/uploads/1/3/2/6/132695517/litotetazekuso.pdfIn PDF document text
    • http://bivaraso.willettonfootballclub.com/uploads/1/3/1/4/131483830/935801.pdfIn PDF document text
    • http://files.nabasco.net/uploads/1/3/2/7/132741029/f90f472e19926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/fbccce_b011befc0f3c4f35bf86ae076cebf837.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/948cea_8232ad834cac4e0db5348228c304c09f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/sasajapubukap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/bioshock_infinite_cheats_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5535/7858/files/falumevumevedobukaxosa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9374a7_979442ea695d454580e19e9a513edcb6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c8c6c_e98569cf040942c0a0a1d0fac3863371.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3dd68e_87f7f7a5bef744248dc251273b943449.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/dcf311_819b82541f824de7aed744ddfd86f4af.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5de1df_dab25752185844e69b7b76f358673320.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 5640 bytes
SHA-256: 0705060bafccb784e2d24ad8e3d73b47cef4ae55069854774bc55f2a5a71287a
font_01_sfnt_off00007dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFC 10288 bytes
SHA-256: 8add6842b5f577e58f237ee507640f0ed8dfd99b26ca0a73f83803104cb8b1b4

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