Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdab4d5fd44dda7…

MALICIOUS

PDF

76.3 KB Created: 2021-04-02 19:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 752bbacffd316d65f278f8189fb1d0a4 SHA-1: b7ff0cb88ec1a4a49cc43c26df2af8ccc532133c SHA-256: dfdab4d5fd44dda760da02f3f8a8b693698663fbca590f87051c190464762886
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document attempts to trick the user into installing remote support tools, a common tactic for social engineering. The presence of multiple external URLs, including one pointing to a potential link farm, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://crophysi.ru/wix?keyword=the+sound+of+music+mcq+questions+and+answers PDF link annotation
    • http://mimisijuz.mypressonline.com/exercice_barycentre_1ere_s.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/e1jdTPQ/zagaboxamazerugux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5ff6a7eb29746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_5fdbea98480a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_60242cca32eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5ffb712460326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_5fd36937e8e9d.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/bicUhfI/forex_trading_complete_course.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/bazaar_2018_hd_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8009a1f3-34fb-4635-bff4-7baffde9c828/precalculus_vectors_dot_product_worksheet.pdfIn PDF document text
    • http://fabavokawibawo.epizy.com/gipobu.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/air_force_question_paper_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc21245-2af4-44f6-b967-492b0a7f459d/5559184295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e79b225c-3465-4c60-9037-a2eb596cc6d9/zalufowofeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be607070-7692-4d37-b0a5-8b1e0a01b98d/reif_statistical_physics_berkeley.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/46197934899.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/julepav.pdfIn PDF document text
    • http://xafotibelazes.rf.gd/craftsman_garage_door_opener_backup_battery_replacement.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/davoxojogipomoxegik.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/tawegovidoditodo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/chevereto_android_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52efdc8-3ca8-4f05-b0cc-177906793133/harley_sportster_service_intervals.pdfIn PDF document text
    • http://fijumusuxolegoj.atwebpages.com/tezopojuvaxeg.pdfIn PDF document text
    • http://vudebedof.rf.gd/ds_emulator_android_online.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_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 5396 bytes
SHA-256: 987065c4c54fa6bb9fff482b9f233031aa4f542b18b687146c6593f5709523bf
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10620 bytes
SHA-256: 0def66522eefab055b4f9983c943ead26b11d74cac37e1d6d76c47e2b0fc932b