Malicious PDF — malware analysis report

Static analysis result for SHA-256 0877312579a24217…

MALICIOUS

PDF

71.3 KB Created: 2021-02-16 21:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 842e36eb163624c1b36a53957b5c00da SHA-1: 11198314087c93b67b34bc4dd3ef602cf85e6524 SHA-256: 0877312579a24217e080a8c4d42c26456425b1e201d0c6149d7252824ccf7b91
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=twrp+recovery+installer+apk+no+root PDF link annotation
    • https://cdn.sqhk.co/xunalafugapa/Cii2igD/see_iphone_photos_on_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/dVgd1ij/4721965994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_602aea1211a68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5ff928d28e09e.pdfIn PDF document text
    • http://xowefew.22web.org/klickitat_fishing_report_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fd7bed555e03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499958/normal_602a4d78570bd.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/aYaQhcl/33956103781.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/xafaxotaful/nowuxuwotaxobid.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/emotional_songs_bollywood.pdfIn PDF document text
    • http://xujalupa.epizy.com/47391395879.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/kolas.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/66558964805.pdfIn PDF document text
    • http://pegumagagi.epizy.com/romanian_birth_certificate_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/counter_terror_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/why_is_my_milk_not_frothing.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/jinja_load_template_from_file.pdfIn PDF document text
    • http://kaxasasetepub.epizy.com/narorunaforaseluxexabutej.pdfIn PDF document text
    • http://rowesatuminef.rf.gd/noxofofewigotavudiwun.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/nefaju.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_off0000d695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD695 5196 bytes
SHA-256: be549aee8a5d6bb2ad4a22af040f718afdb9e94bc5bda8578fa3f3795b9a46df
font_01_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 13108 bytes
SHA-256: 8ccb53cc51dd95139c362d53e175a68cfcd346299ad19e40649dabe89bc9c2e4

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