Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a42749c222b7ae…

MALICIOUS

PDF

71.6 KB Created: 2021-02-12 08:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 00fd207bae308a48c99c4b10b6c3c721 SHA-1: 019805cc12ae370785208a5b26f4c2bc5989dde1 SHA-256: f3a42749c222b7ae9685d8fe62702faaa5db4f6d366a654e1c940fa4f9fa69ee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=kerala+pharmacy+council+renewal+list+2020 PDF link annotation
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/sivezulupir-javoronipovi-guzakiranapanil.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/bY5BZxF/mx_player_pro_apk_free_download.pdfIn PDF document text
    • http://sallles.ru/lfs_unlocker_s3_download50twg.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/wibedubosateg/94302453322.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/isc2_ccsp_study_guide_free.pdfIn PDF document text
    • http://mopasaz.epizy.com/chicken_dance_song_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/android_10_gestures_on_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/skyrim_sheet_music_trombone_solo.pdfIn PDF document text
    • http://kobewanen.rf.gd/hd_movie_site_name.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/nulolumakajuf.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/93207196522.pdfIn PDF document text
    • http://latuwukatagowa.epizy.com/glencoe_algebra_1_6-_6_practice_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EF 5612 bytes
SHA-256: c17d1cf76b1f3e862d938963fcab8e065f3a481201986db42b2f930be5e08d45
font_01_sfnt_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 9952 bytes
SHA-256: 4bdf0ba36b834542c873d51e4174eb8ea89e4d7debbe228227da9cdb7dd14ae3
font_02_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e