Malicious PDF — malware analysis report

Static analysis result for SHA-256 e909db84e719684d…

MALICIOUS

PDF

42.3 KB Created: 2020-10-05 04:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 103c84038f69972c1aa2e8ba154663dc SHA-1: 6a244364266057c7ad90eb9f08aedd38041c4dc0 SHA-256: e909db84e719684dfd9b5c67ad069ad6c7b0e7694119c9f874806711c9ea2b34
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=free+homoeopathic+urdu+books+download+pdf In PDF document text
    • http://files.stefanfalk.net/uploads/1/3/1/4/131406831/1e9aeef266cef37.pdfIn PDF document text
    • http://debabi.sollysummersoccercamp.com/uploads/1/3/0/8/130813554/bonaxijagamez_zexodofuwo.pdfIn PDF document text
    • http://vetupokek.firereiki.com/uploads/1/3/1/3/131378816/gewodarobusuwoxix.pdfIn PDF document text
    • http://files.choice-voices.com/uploads/1/3/0/7/130775567/wunixonofuvemep_pujofizadox_vujimaduv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2789/6219/files/dad_and_me_2_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5708/1251/files/law_school_confidential_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/aug_girls_frontline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb52a46-b679-46ab-aa0d-0678502a97cd/36189423291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0260643-df05-45fe-819d-e9368e41b461/vumefedizirore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9db8ca-6035-4d55-920d-41f213254ab1/bevowifafopige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0676/5473/files/family_medicine_eor_practice_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7014/files/73418075493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3872/3226/files/lenox_federal_platinum_dinner_plate.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 5644 bytes
SHA-256: 6aee063a568c5b365559e5a763c707d0d8b7d1f082aad2c865f15916a7552a5c
font_01_sfnt_off00006a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7A 5848 bytes
SHA-256: df8c7fff537d8dc0d1fd10767a9059d989ea35c190d5770354d98eb60e0693b8
font_02_sfnt_off00007926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7926 10108 bytes
SHA-256: bbbb9267b5067a63ad521e2b411f4efafd6af5bcc6768263c883723664b581d0

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