Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9bf7936e90fca67…

MALICIOUS

PDF

79.1 KB Created: 2021-03-30 23:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d2e6821ba9073bc353f95661cac16ca6 SHA-1: ef5d06179eb1ed7123d735555373d79ece8df983 SHA-256: c9bf7936e90fca670b5fdbc359936566c5e9e413135df48c38e4f7eee5b62bf7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. One of the primary URLs, https://jumiwimov.ru/award?keyword=farmakokinetik+amoxicillin+pdf, is flagged as unknown reputation, suggesting a malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://jumiwimov.ru/award?keyword=farmakokinetik+amoxicillin+pdf PDF link annotation
    • https://cdn.sqhk.co/nejibija/geggja3/chemical_nitrogen_fixation.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/human_geography_ap_exam_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/PBgjPhj/97229209856.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/bfSihkp/hot_wheels_infinite_loop_mod_apk_obb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mugomodag.atwebpages.com/bilangan_berpangkat_dan_bentuk_akar.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_0ff39bc768974565a03a9e24a8b80990.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/754d0d48-801e-48d3-9c32-cdb5d65396f5/bosch_axxis_dryer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3aa4c4-441e-46f3-b405-d057ace6ccab/what_is_the_current_version_of_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea31e66-9980-4961-b8e5-f466a9f6ac3e/how_much_stuff_can_a_5000_watt_generator_run.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9497f8-f01d-411f-ba32-a726914bd492/72945312981.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/462174033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a81eea5-cdde-43fc-ac1e-50506f05baa8/zeget.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/merry_christmas_everybody_sheet_music.pdfIn PDF document text
    • http://bidejepeko.onlinewebshop.net/apa_itu_kindle_paperwhite.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/denon_avr_x1500h.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/966ec9f8-d9a2-4b4f-a754-ae725ef3feeb/new_dance_group_name.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/partnership_by_estoppel_occurs_when.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/crosswords_with_friends_answers_10_20_18.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/3732363085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95ab69a-968a-47f5-9587-ccee1aea704c/nuduga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8254dea7-e26a-434a-99ae-082266387f90/22755093768.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/hp_2013_ultraslim_docking_station_2_displayport.pdfIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_35567907741d45edb8c90952eeb248c5.pdf?index=trueIn 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_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 5212 bytes
SHA-256: eb2130715105d950d3bab10e788e09b85d61a82e9cb91ddae7a6b892ceea3a06
font_01_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 11776 bytes
SHA-256: 739aeebaec71cdbdf89dc417442bf40049aa86a5eff726b99e3a3ccbdded3e81

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