Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab89678fa30a3dc…

MALICIOUS

PDF

70.5 KB Created: 2021-02-13 00:38:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1e578e48fef226a9e1528c021679d345 SHA-1: 2ce22f3004df882338e81fca954060ed0556dd43 SHA-256: 2ab89678fa30a3dcfe5bcbe83a7fd707406100d69967a29b656a744b9c1f23c8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains a lure for downloading a messenger application. It utilizes an SEO redirector to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=messenger+apk+latest+version+for+pc PDF link annotation
    • https://cdn.sqhk.co/tipefimex/bjciIhb/22276250395.pdfIn PDF document text
    • http://fuvunopulo.22web.org/aaradhike_video_song.pdfIn PDF document text
    • http://fimewot.xyz/chrome_portable_rardtc8x.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/inverse_of_quadratic_functions_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494435/normal_5fdd61bb5917a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464521/normal_5fccbfbeabd49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_600e082acf742.pdfIn PDF document text
    • http://xonanudo.iblogger.org/12249905456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fff2399ee5d8.pdfIn PDF document text
    • http://romeita.space/ruscus_aculeatusb08sm.pdfIn PDF document text
    • http://clientesdkb.com/iihf_world_championship_2021_tickets16nms.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/bOjgigd/303863706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fc5b438ceeec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_5fedf74b27e34.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/purixifusipelid/kavajejunugexem.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/1979419939.pdfIn PDF document text
    • http://natomig.rf.gd/sharp_android_tv_app_store.pdfIn PDF document text
    • http://ruvatarojamun.rf.gd/horsenden_primary_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/masufuketuvuwegi.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/google_play_store_apps_com.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_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 5312 bytes
SHA-256: 76c665ebd9b73b412bce352f65b47fa5c9f149e4469418d782ba4ad446a1ab5d
font_01_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 10696 bytes
SHA-256: 98e52012f92c0339893c4539c77ef72fb9f54fadd8308a289c2140551ff5ffd1

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