Malicious PDF — malware analysis report

Static analysis result for SHA-256 61237e315f81dc6f…

MALICIOUS

PDF

70.4 KB Created: 2021-02-16 20:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0a1ac739091bb13eb9fdfdd23b0b14af SHA-1: e7d7229ad61a23f9a622985847a31822c7b846f3 SHA-256: 61237e315f81dc6ff79867fb14eef2f0cf3105618c6bd915ec0c60feca9295b1
136 Risk Score

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://seumenha.ru/123?utm_term=how+many+holes+harmonica+is+best+for+beginners PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460944/normal_602a46e3c2940.pdfIn PDF document text
    • https://cdn.sqhk.co/gorubabor/Ariajjc/get_real_followers_likes_for_instagram_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/jff5Sjb/betuno.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/Uqpnbqw/ruvelukepivobagugejelubub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fda055511fc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366024/normal_5fe2cb104e66b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393361/normal_5feed74173e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_601199d7398b7.pdfIn PDF document text
    • http://vosalax.22web.org/89299335467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_6014a5aae2abe.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/jrgdgjd/mosquito_buzzing_sound_effect_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/higjgd2/drastic_ds_emulator_apk_full_espanol_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rirakibugo/hfQi7Ge/neighborhood_market_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_6021bec5ccade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481273/normal_5fc7d8c027014.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/ghfhcvX/fox_sports_south_directv_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinelak.rf.gd/vikav.pdfIn PDF document text
    • http://wikusonusi.rf.gd/guidecraft_kitchen_helper_vs_learning_tower.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_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 5592 bytes
SHA-256: 276941a7c1f5d969a3cc567b39eafdc51f75c3b364ac36b46351956ff2b02d36
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10276 bytes
SHA-256: 5d57a019598fe7ca41e3eb54d127c727134f1840fb1384b9c23ae4bc28c0053a