Malicious PDF — malware analysis report

Static analysis result for SHA-256 7377ff893117bc29…

MALICIOUS

PDF

43.0 KB Created: 2020-10-16 07:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 69e7f23f6a6417a7fb3feb849589181c SHA-1: 7b7929692d84907cdf2d770abf446efe45762269 SHA-256: 7377ff893117bc292f292fd49d663605c0de78055dc6251db5565b57be36f86c
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/123?keyword=edema+agudo+pulmonar+n%25C3%25A3o+cardiogenico+pdf In PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/39593683199.pdfIn PDF document text
    • https://site-1040297.mozfiles.com/files/1040297/zuvamo.pdfIn PDF document text
    • https://site-1040800.mozfiles.com/files/1040800/goruv.pdfIn PDF document text
    • https://site-1041079.mozfiles.com/files/1041079/24358928693.pdfIn PDF document text
    • https://site-1042279.mozfiles.com/files/1042279/gujun.pdfIn PDF document text
    • https://site-1038440.mozfiles.com/files/1038440/89232103312.pdfIn PDF document text
    • https://site-1043495.mozfiles.com/files/1043495/gusiromozod.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/939e82361.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/dunakavezezomopef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870c656ca4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f874f2c9933a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8764ad95d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f889f7a722f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4909/3797/files/37034176469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5740/5848/files/sc_ela_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8171/0750/files/bo4_blood_of_the_dead_shield_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8972/1496/files/ranejufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c57d58a-4a4a-4236-9245-4cac29712442/56373233492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224ed2da-8eec-4d4b-b070-2e00d1be5da1/bujixelalapebiropep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47dfac17-e33e-4e71-818f-f128c556a076/nunisasaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4b2f4d-3fa8-419f-8dd3-132db91a40e2/46939139417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7bdb82-a1b4-4e49-b7e2-6d510ec08a6a/46287682905.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_off00006641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5572 bytes
SHA-256: 507f8dae1b4ef1c50acbd744d4bd9e4c8f79b3c0ce5443311b3d7bc42e4241da
font_01_sfnt_off0000788d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x788D 11840 bytes
SHA-256: 0f2b28d0039b6a1093d412257e14d7d04cdc69f14cb350e1013e203c6191768c