Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9fb109de5fbd3b…

MALICIOUS

PDF

75.8 KB Created: 2021-04-01 12:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fc0d3164747389fb81105f0bb7e4def SHA-1: 15ea4140fca3cdcbd5c3bd827b9cd90dc30b36a8 SHA-256: 0c9fb109de5fbd3b30b2f1006e5b170c89fbe697adceb508c024deed5673d128
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and the ClamAV detection as Pdf.Phishing.Trojan strongly suggests malicious intent. The embedded URLs likely serve as the initial lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=get+workkeys+test+results
    • http://xemokajoled.medianewsonline.com/latest_celebrity_news_gossip__photos_tv__showbiz_daily.pdf
    • http://organicnu.info/delijuwulire6wmvw.pdf
    • http://immortal-sho.club/doduga6q8x3.pdf
    • http://bukanugizini.mygamesonline.org/bsc_physics_question_paper.pdf
    • http://noksipals.online/37454765457sm4wt.pdf
    • http://sakulog.sportsontheweb.net/25209808572.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10cfd809-f4fd-4238-b913-d01b793da09d/tarovizedobovur.pdf
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1eee9f577edc470da1468b14105bec16.pdf?index=true
    • https://uploads.strikinglycdn.com/files/22d5508f-f50a-491f-92bf-5205a72e10ac/best_way_to_study_for_master_electrician_exam.pdf
    • https://s3.amazonaws.com/foneniz/action_plan_ppt_template_free.pdf
    • https://uploads.strikinglycdn.com/files/e465892b-9378-4c8c-a561-9ad282a3e49a/1811582352.pdf
    • https://uploads.strikinglycdn.com/files/f7096d5e-e3dd-4407-81bb-8a70114d60ea/2017_lexus_gs_350_f_sport_interior.pdf
    • https://s3.amazonaws.com/nufidibodudulad/96653894275.pdf
    • https://s3.amazonaws.com/sazomo/model_3_standard_range_plus_software_update.pdf
    • https://s3.amazonaws.com/fekife/xender_apk_old_version_apkpure.pdf
    • https://s3.amazonaws.com/rezugekolaba/60133371150.pdf
    • https://s3.amazonaws.com/ravuxudibure/probability_tree_diagram_worksheet_easy.pdf
    • http://fojakosi.atwebpages.com/65175175644.pdf
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_1a505ed7e36b4ae2818a78a1292ba8b4.pdf?index=true
    • http://nodikaduf.onlinewebshop.net/zoxuxabubepadusapidez.pdf
    • https://3491c55f-27e3-40bb-839b-e55f5d2a6f06.filesusr.com/ugd/d14465_0fb41d5abda0409b8baf22979526493f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2a88c086-19ad-4ac3-909b-a8af8c1c71ea/rikobuniruk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b2.bin
d97faa3279e453f991824fd6f7753b74613682fe22608be593f1595b499d22f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 4760 bytes
font_01_sfnt_off0000fa12.bin
d2711207086b6ac6dc778fbad155efb855e007ce034c68fe488bcb9fc1cfb505		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 11512 bytes

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