Malicious PDF — malware analysis report

Static analysis result for SHA-256 45da415591ef9b6d…

MALICIOUS

PDF

48.1 KB Created: 2020-10-31 23:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 8f79d7f7a3d150795b5882a65ce26e3e SHA-1: edf6b133c967e639365ccce9824e6d3f5b31fb7f SHA-256: 45da415591ef9b6d9a86445705b28e2b6b336bb2be3066e589d5b93eb703c713
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.me/123?keyword=how+many+protons+does+sodium+chloride+have In PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/xewoxi.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/fifolaketobufa-digopogoxen-jimamawamuge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c765956c-2849-4d49-86d1-7ddcd500f5d6/hand_and_eye_of_vecna_5e_stats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2671/6100/files/credit_memo_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4952/8727/files/bdo_level_guide_50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2154/7713/files/pudelule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5954/2947/files/samopixefazitepubenoz.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/rolutuzeruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b2f7a5-e8ca-4f59-b928-1e995a56d5c1/52689486369.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/89067089784.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2806/1087/files/papixirijubineki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4325/3152/files/diagramming_sentences_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1089/9099/files/love_rosie_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ce4f1b-3050-455f-ba3d-f932941f67a0/paragatode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8953/6173/files/talukifafimejozetavanuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc36c76-64d6-42e1-97b6-86bd11079b85/vekubovabegud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DB 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off00007e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 5528 bytes
SHA-256: f58807696bc3686379a440a4e77e935c8a0c4037afd53a11b98d82689dc25907
font_02_sfnt_off000090d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D5 9844 bytes
SHA-256: bce9f22b0d3c8609fed30d5d82713234fa599b7f67b85b2d16d990b97714ed7c

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