Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d45441c45cfa9a…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 13:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b146e8c4b79316434b90a719d027f852 SHA-1: 951be8bc5f0e5757d58afdaee3a121a144334116 SHA-256: 25d45441c45cfa9a0ed50dbb6b341d696ee80a161d9edd9bd6268c8689241d1e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://ponafet.ru/wix?keyword=bunk+bed+ladder+hooks+canada PDF link annotation
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/3303647.pdfIn PDF document text
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/xoziviwewiziluwobav.pdfIn PDF document text
    • http://sibepizibatiza.iblogger.org/fixed_fairy_tales_definition.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/6726911.pdfIn PDF document text
    • https://nakowubolitek.weebly.com/uploads/1/3/5/3/135349387/gogatovadaj.pdfIn PDF document text
    • https://cdn.sqhk.co/nisisepolo/hWjaHhf/vajodakivofogimodela.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/PILhigf/wotarasaxivekugosut.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/hdv5haJ/85101522483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/bahubali_2_1080p.pdfIn PDF document text
    • http://junenizexi.epizy.com/kudisurovisuduzepipemekek.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/gmat_prep_books_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/vugitomatifuwewukew.pdfIn PDF document text
    • http://xizokokov.epizy.com/swiftkey_arabic_keyboard_apk.pdfIn PDF document text
    • http://xovimed.rf.gd/28323851951.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/fadifafujobeb.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/kupel.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/remasijuri.pdfIn PDF document text
    • http://luzawuwu.epizy.com/bipitofoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/fakijirakowujasir.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/parallelogram_of_forces_worksheet_gcse.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_off0000de3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 5280 bytes
SHA-256: 9414e3ee998b5e658cad0c79ac94e2498eb0f39b2744f54dfa39ffdbb26aa692
font_01_sfnt_off0000f027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF027 10212 bytes
SHA-256: 1f59642a3bfc95a228e13598f8c2593cefbcce9c1bda17a37a2485cfe8f0985e

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