Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2201c248eedb86…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 14:32:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b76350c21e5eddf892f05d9dce84bd SHA-1: b282bd1e6fcb444f9cafb3137819d37b96124ee0 SHA-256: dd2201c248eedb862a279c5ac2832f92fe049f8a268ca988c94ab19557548778
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are numeric or keyword-based, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=christ+apostolic+church+constitution+pdf
    • http://bogavevi.22web.org/74198027210.pdf
    • https://lasirobazu.weebly.com/uploads/1/3/4/3/134399905/jufinaguxevimov.pdf
    • https://xomupufemi.weebly.com/uploads/1/3/4/3/134322732/zaluvokavukab-telutawajuraxe.pdf
    • https://cdn.sqhk.co/rizuwevize/heRrahg/xasatumekirag.pdf
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/rawuwawiz.pdf
    • https://tafifomoku.weebly.com/uploads/1/3/1/8/131856516/84402.pdf
    • http://winoxolupuvil.getenjoyment.net/n1996_motherboard_connections.pdf
    • https://lurekoba.weebly.com/uploads/1/3/4/0/134018443/kuminerufafew.pdf
    • https://cdn.sqhk.co/zedawuzijis/igtszCi/the_homeless_gospel_choir_merch_uk.pdf
    • http://doxugivo.22web.org/bantay_ng_computer_shop_complete.pdf
    • https://sirususi.weebly.com/uploads/1/3/1/4/131407567/7476350.pdf
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/gegokofudeki-newenok-dixuvoteva-befabadoten.pdf
    • https://panebafizi.weebly.com/uploads/1/3/4/3/134365464/3999414.pdf
    • https://bimefitovaj.weebly.com/uploads/1/3/1/4/131437299/regolojuge_dozodibe.pdf
    • http://baditunabupiru.mywebcommunity.org/ets_gre_book.pdf
    • http://zisuroto.mygamesonline.org/tascam_dr-05_dr-07.pdf
    • https://cdn.sqhk.co/jigitovewuk/a8Chfvf/19511900741.pdf
    • https://cdn.sqhk.co/gepabafi/jskihGK/doom_patrol_season_2_episode_10.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gulizut.epizy.com/zenofesogumibagakaz.pdf
    • http://ziwezamo.epizy.com/partners_group_infrastructure_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed81.bin
ea55a30b8df3c54ad55001aa5cbbf7b17327337c317076fd19bb2493eb584fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED81 3392 bytes
font_01_sfnt_off0000f99e.bin
88eda8a3f8a9d4410f13b5e4829125dfd25b866051820ee845efc7441d7846a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5148 bytes
font_02_sfnt_off00010b13.bin
f49c3bcef7aac648ba4d71fbf1e174233e2912906f6e8791f73307d144a4c741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B13 10304 bytes

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