Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fcd0f835a4d9f2…

MALICIOUS

PDF

88.0 KB Created: 2021-04-05 13:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a2da0bf602a517004658c9a6fc67a527 SHA-1: 34195c3dffe64de6168a3e23126ee481384107ed SHA-256: 60fcd0f835a4d9f2c78399d5e28705c93ce173977a8dade25f451876444f6cdf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing document, specifically using an image lure to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL and the document body, though heavily obfuscated, point towards a phishing attempt disguised as a camera review, ultimately leading to a redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=is+nikon+coolpix+b500+a+good+camera PDF link annotation
    • http://kimiter.medianewsonline.com/13474635628.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/autism_breakthrough_book.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/8948194449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_5fd8d883ed313.pdfIn PDF document text
    • https://cdn.sqhk.co/saturarad/pCWghhi/centurylink_email_settings_for_ipad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fee81ee9ec41.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/SWuwhdk/pawn_stars_the_game_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403128/normal_60000ed109d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_60450d70e873d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_6054bdd18ddfc.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/Khghfib/wexisugaxizugolagi.pdfIn PDF document text
    • http://ziviludemedo.iblogger.org/black_and_red_wallpaper_for_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382620/normal_60000e9fef3d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_6063d61a7b51a.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/budesonida_presentacion.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/legesiliv/34376213207.pdfIn PDF document text
    • http://vabizawez.epizy.com/mahalaxmi_calendar_2020_marathi_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/sosepe.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/date_and_time_format_in_india.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/cacti_and_succulents.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/nanojawowelarixuweli.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/figures_of_speech_worksheet_grade_5.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_off0001195f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195F 5868 bytes
SHA-256: d7bbbed98bccac20ba03d571de1a464c98d1fd783e178353f39a1ffae1cfd98e
font_01_sfnt_off00012d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D45 11016 bytes
SHA-256: 3965304ca87064be46ae6de32c595878b44685348ec86afd3216e2daa40bd53d

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