Malicious PDF — malware analysis report

Static analysis result for SHA-256 944632a3b69db32a…

MALICIOUS

PDF

63.4 KB Created: 2021-02-10 17:49:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6088962e8db8a1afa19687628d4cf202 SHA-1: 229b73162b050fc07ad3dd6dd11cf007a2d35128 SHA-256: 944632a3b69db32a96e367abcb9542e587d60ed400448bb18f32a13d6148cb49
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=freight+train+hopping+guide In PDF document text
    • http://magic-spring.com/carry_you_ruelle_piano_sheet_musicgglrn.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/d37f66f0e.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/TXSTSO1/msnbc_live_stream_on_smart_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/kOE1mjb/voice_changer_shark_studio_pro.pdfIn PDF document text
    • http://thedefenseforge.com/death_from_above_1979_black_history_monthaghxk.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/jjdgjRx/85275235190.pdfIn PDF document text
    • https://cdn.sqhk.co/losegiro/jhid3ii/game_room_swivel_chairs.pdfIn PDF document text
    • http://all-host.site/anstoss_3_windows_79tqi1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_600d6988514ed.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/kakirivapefo-xufipiz.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/gusule/3905477581.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/dadepogoxexuxikozup.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/35086573269.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/kanirivabime.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/free_printable_life_skills_worksheets_uk.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_off0000bed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED1 4968 bytes
SHA-256: 8b40cd5b18a4fb21d0eed2393d14c68faa182dd0f577059aa91c628a45bb3480
font_01_sfnt_off0000cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB0 9792 bytes
SHA-256: d4e4ecdf9e317447be03d7525fb30703e4be833f73c45320b5b6729f6c7c06bc

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