Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5a272b7fed4b6e…

MALICIOUS

PDF

94.0 KB Created: 2021-03-21 05:29:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 67553952f36ee5a8d9b9f506b71e9832 SHA-1: 649bbf45d47405ec896799112456d41b114bf160 SHA-256: 1f5a272b7fed4b6e8418077cf89e7cbfd20041c8155eac3219fbdbcb2ec570a9
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure related to 'Escudo de guatemala blanco y negro' and redirects to a phishing URL. ML and ClamAV heuristics strongly indicate maliciousness, classifying it as phishing malware. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=escudo+de+guatemala+blanco+y+negro PDF link annotation
    • https://cdn.sqhk.co/dopuzodopuvu/zgiu7W3/50746690993.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/jusunogosopobunusutumo.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kenmore_coldspot_model_106.511_water_filter.pdfIn PDF document text
    • http://kofupum.mygamesonline.org/beatles_free_sheet_music.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/zajutoxumajisafaxofagub.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/Sgg9Egr/defogari.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/wulagisi/69626348682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96877891-6267-4d76-993f-5fb2b14f99d6/the_man_without_qualities_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/dungeon_fighter_online_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4be71c-3c6b-49d5-b5a4-6f854e0534ee/computer_hardware_troubleshooting_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/josovixozidifavipexe.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/tuwomawotolezabut.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/frozen_cartoon_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/lisirexazerefomunajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/38920858550.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/kijesevirevobowisopewas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3cb8b39-0d97-4b71-a9c6-8be3f015dfe4/personality_and_personal_growth_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/mobogenie_apk_new_version.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_off0001303c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303C 5460 bytes
SHA-256: eff63391fbfde09401db900cbd6cb1fa377f923259485835433b74d5780afad3
font_01_sfnt_off000142c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C0 12000 bytes
SHA-256: 97bc7317f76538e6647040a5634aba0f8dde2374e4f7b8e08ca2de76e02db560

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