Malicious PDF — malware analysis report

Static analysis result for SHA-256 c590846a16d4a848…

MALICIOUS

PDF

213.6 KB Created: 2021-05-28 08:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ede15ecaf253d7c889655b207989bc26 SHA-1: c5b0f9e1539b4e83ae71f02a4341809f7aeba738 SHA-256: c590846a16d4a84806dfd7becbbc5bff956a79b56d78ffeb953b5ae9504dd3a8
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a site designed to trick users into clicking through, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=what+is+the+strongest+thunderstorm+in+the+world PDF link annotation
    • https://luvisumor.weebly.com/uploads/1/3/5/3/135390586/tokokonoworez-jaxometativa-pedufaf.pdfIn PDF document text
    • https://gosasaweju.weebly.com/uploads/1/3/1/3/131384289/firaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5fe53ef46a4a5.pdfIn PDF document text
    • https://dagukipaxezij.weebly.com/uploads/1/3/4/3/134352206/megafogisisomo-kulajija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_600a96c026e88.pdfIn PDF document text
    • https://fokuxadeji.weebly.com/uploads/1/3/4/5/134585395/tebusise.pdfIn PDF document text
    • https://sulefufevonabu.weebly.com/uploads/1/3/4/3/134363738/2670486.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://uploads.strikinglycdn.com/files/603799b6-4223-4321-8b76-edc68f9ea9e4/45683560072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a7741d-bb6f-4bbf-9c1e-2041068b7839/98983596674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e4e42e-0de9-4880-acbf-f13517f8e911/rca_galileo_pro_11.5_32gb_2-in-1_tablet_case.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61df9188-15cc-46cb-af31-3fadf569feb1/51760763281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c60049-c0b3-4716-a097-62f6c39c87af/grade_2_workbook_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ea1a57-4bb0-45d2-a183-f3e340d73dd7/the_disaster_artist_book_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c0db81-ff42-4d37-90bf-9fa26ebd27d7/sims_3_best_worlds_on_exchange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad992ce-c130-4de9-88db-260dbbfa863e/64942766403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbd879a-691f-4638-96d8-66f66950815c/sda_live_church_service_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa18bc58-f192-4f90-9015-95bcf7ed4b24/beretta_92fs_spring_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b9c2b3-74b4-4f0e-91ff-2c5708853821/tawamiwifomofaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/725d6a85-3332-4ebd-80f9-a6db0c0ded45/nogimisenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/159716a4-95a0-4f71-aaf8-dae8430a4bbd/zazusekagovonaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc303996-20e2-4760-830d-4ecfbb9fcd2e/3498776202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b61a7a8d-0cef-4c5f-835e-46c45eef8cac/brother_convertible_knitting_machine_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb872235-43da-4052-bfa8-6d5aea372d38/how_many_pages_is_the_secrets_we_kept.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_off0002fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBE0 5228 bytes
SHA-256: cfc4cab31d520e959120154c10cef4ae01bfeebe26df3d1fd3d16e80f63b9d85
font_01_sfnt_off00030d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D85 13464 bytes
SHA-256: 9f6a2bbf92430a70470c4acfb06b9650ff47b6e25b8f156ff7c2f21a7f336641
font_02_sfnt_off0003395b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3395B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c