Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c572a2c1ba67c41…

MALICIOUS

PDF

74.6 KB Created: 2021-02-05 23:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4032b591c5761c9ff551cb1241a4c190 SHA-1: 540fd8d37e6687be0903302de09c242178deb4ed SHA-256: 4c572a2c1ba67c4117e78a95c0629ab43511592792db4ef25b3235c0bfad902b
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wb?keyword=blizzard%20%20super%20slow PDF link annotation
    • https://cdn.sqhk.co/kugefiruxat/bgj8kjh/forowonuzanolovevofirik.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/hcgi0tU/best_find_friends_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/hgjjkgc/online_slots_real_money_no_deposit_bonus_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/hjkz8ha/76798684844.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/je0yhhj/94185628635.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/igiyGia/48982165173.pdfIn PDF document text
    • http://rivuxini.66ghz.com/defuduzumodinitubesefer.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/piwanisaj/kemabopeja.pdfIn PDF document text
    • http://xuwuxubemepimox.rf.gd/aace_statin_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/payment_receipt_format_word.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/nedagipinanapam.pdfIn PDF document text
    • http://mokodipixa.epizy.com/cisco_ironport_c390_datasheet.pdfIn PDF document text
    • http://jonemif.epizy.com/61946931866.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/xadajajupijifebowofimilas.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/indomethacin_mechanism_of_action.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_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 5144 bytes
SHA-256: 9bd8bc12f7864d22ccc0910ead0d2da17d2a81139d19d2a8328289b0f58c9e67
font_01_sfnt_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 15540 bytes
SHA-256: af7d52ddbbab3366b2ed652c86fadfc1e996302fafab9f8f0931966696e8aebd