Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c38b1fbe01271cc…

MALICIOUS

PDF

86.0 KB Created: 2021-03-19 00:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 48f2fa2dabc48924488faae8f82b69b7 SHA-1: d405de72bbc0d7df284767e6c216efed25cb46ea SHA-256: 9c38b1fbe01271ccf6f8624bcf1e97da8b700d8297fee674ead11fa4b701c9a6
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 heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The embedded URL `https://soxebez.ru/wix?keyword=play+friv+games+unblocked` is identified as a redirector for phishing. The ML classifier and ClamAV detection further confirm the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=play+friv+games+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476446/normal_604a4c9e921bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_600592412de40.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/marvel_encyclopedia_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_6028f3d4590d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470399/normal_5fce4694af4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_5fe97f3a47eb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fff770a4688c.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/7378d938-22c2-4d62-92ae-ac6514d66f5a/lonemisexufiraxewiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e986fad-3b9d-4188-ba2a-3654274c3535/foleparamenatobunev.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/weather_report_limpopo_province.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce6719d-9041-4b78-9148-848dd5abedcb/fakigawemusizawaka.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/rusifipafekimek.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/mr._amari_soul_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e861e3e-7c96-4e61-b910-854e9e636a8e/calligraphy_cursive_writing_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/66267920630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedff1cb-128b-4a4c-9413-ecd86c212251/how_to_fix_vicks_cool_mist_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de92893-0052-4f31-ad95-7a2004abcc68/77578232081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52a2a44-c6ec-4aad-8321-9f0cfacda534/quando_comecou_o_horario_de_verao.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485c09c6-09a4-4aca-b9f6-52f1317436c6/nunebonorimapemobopepibok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f165f6e2-1338-4aa1-ac74-ac1a53b55856/xerox_workcentre_7855_brochure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93dcac64-5e63-4344-88a3-8176ebf6c641/sazusodenatawelodigedivi.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_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 5708 bytes
SHA-256: 384d0457721f977dcd6ee7594e5fb0328f733567f5b7b2eb2ea7640f2f7e43ba
font_01_sfnt_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 11044 bytes
SHA-256: 3465b2a51db87a501fcab66da304f1a38ef46dee0eccf1911765671081d8e7d5

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