Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72643ce74467730…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 03:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e599ecc4020d25b29a8405836c243365 SHA-1: b5ae4914a840698155ad7a89378087056fb24cb3 SHA-256: c72643ce74467730e919e63f7f31de116eafdee94f0a276a3ac8c8f0e8022443
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/123?utm_term=ard+mediathek+app+video PDF link annotation
    • https://cdn.sqhk.co/jugemito/ifjf0hf/rofikos.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/27866486681.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/Iif9o43/f1_mobile_racing_download_apk.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/bodybuilding_exercise.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/aWgimhn/dumovadejurabinabovujura.pdfIn PDF document text
    • http://tinubawolu.mywebcommunity.org/zisodogodadovumibukomig.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/hgKoge8/configuration_management_plan_document_template.pdfIn PDF document text
    • http://airbin.top/override_difficulty_arkiy297.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/4rLoagc/snapchat_streak_ideas_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/jd91Phf/clash_of_zombies_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/ihfjezz/10203124290.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/Jgjgfk6/tumblr_search_history_delete.pdfIn PDF document text
    • http://goodsun.space/13450271573ioowv.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/icgcT4P/sadatay_my_damie.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/auxinas_y_giberelinas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falariwupap.myartsonline.com/spring_boot_reference_documentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff578935-9f1b-4ce3-9b6d-2c7cfbf1275a/how_to_restart_casio_fx-115es_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f5c453-c3ce-4454-9d8d-e776f5b41542/44923543783.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_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 5104 bytes
SHA-256: c6483945964b11d77a4f34f46f3a8eb1919e088c186b2f11862cd66dc9b9004b
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 11992 bytes
SHA-256: bd3df2966b0b663bec3480803b55bea7eb7d17d5ba0c3e7cfcc2a8e84967f7b7

Open this report in the interactive analyzer, or submit your own file for analysis.