Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d92fa4f1fb938f3…

MALICIOUS

PDF

68.0 KB Created: 2020-10-01 09:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0e5f2408985008270f64a8c4694966aa SHA-1: 7979afdcc8b9e5af1515a4d30df5d126acfedf45 SHA-256: 3d92fa4f1fb938f39a05c8c60658840c6f3b23b9aa2bb5209b2f2b4cb2c9fce6
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://ggtraff.ru/strik?keyword=antibioticos+en+el+embarazo+pdf+2017 In PDF document text
    • https://site-1040200.mozfiles.com/files/1040200/33671067921.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/35561346317.pdfIn PDF document text
    • http://files.drjeannewilson.com/uploads/1/3/2/6/132681392/40b53e0a3af5.pdfIn PDF document text
    • http://lugub.sophiagardiner.com/uploads/1/3/1/0/131070719/rugelamiguwin.pdfIn PDF document text
    • http://files.baytutoring.com/uploads/1/3/1/3/131398091/nefutipara.pdfIn PDF document text
    • http://womoto.loveforlocals.com/uploads/1/3/2/3/132302921/7718724.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/fulibawisagixerog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1390/5050/files/jigemaweza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/stage_manager_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/popozilosadagerum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/1989_volkswagen_cabrio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/36327081641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0655/files/wapalulotutuzixoniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9982/2752/files/the_scientist_coldplay_vocal_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/5240/8488/files/bike_background_hd_photos.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F6 5672 bytes
SHA-256: aafbab6537722a4deccd53c2edab4679432212e408a8f285e0309b375a70e54e
font_01_sfnt_off0000c423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 15208 bytes
SHA-256: cea7e34f95450047f09273e0b166132a73a1df03720219289bd7ffd59d93dfad
font_02_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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