Malicious PDF — malware analysis report

Static analysis result for SHA-256 debb7f4a1ae10443…

MALICIOUS

PDF

77.9 KB Created: 2021-02-10 17:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ccd25beb2de2fede012e51ba38abe4ac SHA-1: 22702f16979386fcc61b00da91e9db8a9787d84a SHA-256: debb7f4a1ae104431d52ed1c4766d14ca3a8e54bd49017e18350467dc4e7f5b9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate it's designed to lead users to malicious content, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://druttle.ru/123?utm_term=russound+p75+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471513/normal_5ff66a04aac6b.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/aQjfhbP/towamemiragiwirelobu.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/fsjcRjj/car_wallpaper_hd_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/ZifJ1WW/nulonexoxisuvoxesug.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/dBAPgh3/jump_rope_training_videos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_601128d91bac6.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/1869094.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/hjgjbih/wuzenavigewizorije.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/dojamojosaxepijutip.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/1gQjcSB/foto_studio_di_kelapa_gading_mall.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5fec8700c3762.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/0d6fea04927ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fe558262d86d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/veraxawewib/human_body_pressure_points_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/the_norns_in_old_norse_mythology.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/uc_mini_apk_1_mb.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/gossip_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/samsung_s10_5g_camera_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/form_submit_button_trigger_javascript.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/biposafovatirowef.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/autodesk_character_generator_full.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/mdu_b._ed_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/the_integumentary_system_crossword_puzzle_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 4856 bytes
SHA-256: b18be58938412ca2af51d4af4b986342852c1cd8658efb448f9fd1f7d8a3c057
font_01_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 11300 bytes
SHA-256: 9f004195aa2d2f81249cb2495b626e3610287cd621187c41a54d5f3b05d9c5f0
font_02_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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