Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e616942f0d4d0f…

MALICIOUS

PDF

64.5 KB Created: 2021-02-08 06:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e87213fda9e67bfc9815e7012b14b93a SHA-1: 4532b799a7557aa74624a55d9d93f02bf57fd280 SHA-256: 10e616942f0d4d0f6182d3eed5e68052045d3459f994c4af885feae7ef36205b
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/aws?utm_term=loctite+243+material+safety+data+sheet PDF link annotation
    • https://cdn.sqhk.co/toromerepowa/ghjfgi9/zombie_diary_2_hack_download.pdfIn PDF document text
    • http://se-mrush.com/billionaire_habits_in_21_daysvlmfy.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/SYYdUjf/legacy_of_a_whitetail_deer_hunter_shooting_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/hhdR4qr/teach_your_child_mental_math.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/xisasapologojibo.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/6465190.pdfIn PDF document text
    • https://cdn.sqhk.co/xafileme/oiaoIHb/fantasy_premier_league_gameweek_34.pdfIn PDF document text
    • https://wiselorasen.weebly.com/uploads/1/3/0/7/130739143/vowetup.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/UhdiduZ/facebook_search_people_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/jigezja/lords_online_best_heroes.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/AgcFhjd/63465275687.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/ydJgfig/berasevasixebaputuminewu.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/lomogas/vufivibudobuk.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/jerozexuxowivoxused.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/bittorrent_speed_up.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_off0000bfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE9 5688 bytes
SHA-256: 5a6f39309cc3b5e46a69d784d8c7ee045c1947c955e343bcbc656fd31ff8a3a1
font_01_sfnt_off0000d32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32C 9948 bytes
SHA-256: cb2b6496f52d1c728f258084a0e44d8d124e0a9a7b99b4593ecf3af5da40435f

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