Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e607666b890081…

MALICIOUS

PDF

91.5 KB Created: 2021-03-13 16:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c5f17d1e1ecb5c9d00457e381fd600ff SHA-1: 8f5e86ca8da443c468a2d77d753984bcf38dc46d SHA-256: 17e607666b890081b515c6c83cf33c35e32bbb638b2fcb00a027fb3074761f12
186 Risk Score

Malware Insights

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

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 0.9996

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://kuzutuzo.ru/wix?keyword=how+to+hack+super+mechs+2018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494440/normal_5fcc0828ae637.pdfIn PDF document text
    • http://artistichomesolutions.com/chameleon_evolution_gamebijcs.pdfIn PDF document text
    • https://delidago.weebly.com/uploads/1/3/0/9/130969485/pozavodujoli_xiropurifakigi_kedupufebe_zagaxifidolofax.pdfIn PDF document text
    • http://mynasert.online/blender_guru_hotkeys2n2ev.pdfIn PDF document text
    • http://zejufixapoferu.iblogger.org/tozukejigasaripa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488315/normal_601256c65f70d.pdfIn PDF document text
    • http://loletopuwiv.iblogger.org/natepazogogurijepojivaz.pdfIn PDF document text
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/gabinilizogevet.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/zibolipibepadape.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/396f1254-84ae-4acf-956e-6eaff976aa88/63899383382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d90507-ccec-4e30-b105-c312ced58a30/self_determination_theory_three_fundamental_needs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2628ed7f-2134-4b12-aa47-f57aa63d8b4e/can_bose_acoustimass_work_with_any_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/652cd857-b5af-4429-8725-087fbc78fc8c/protocol_helicopter_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f46555d-c623-4818-b2c3-cf0b3beff95e/chinese_dirt_bike_parts_near_me.pdfIn PDF document text
    • http://miduzusajaveg.rf.gd/kodaline_moving_on_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db252c8-240e-4346-981d-c94a845b7903/gitoteredujozoxoxuzej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946bbad8-be3d-40c0-94d0-1579e896feda/potajiratefife.pdfIn PDF document text
    • http://pikazunelovo.epizy.com/bsc_syllabus_maths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf7bff4-3a82-4d7b-8e4c-f23cb8cc75ad/pemaninorobigajore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba171d33-e487-4080-986a-0c8e9041f4c7/84685187590.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 6740 bytes
SHA-256: ce1a1c1fbcecdd9a100c270fe5afb1d6ae05b66a675c21571ab190afb2906990
font_01_sfnt_off00010af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 5776 bytes
SHA-256: d02aec76c451018c3928d187e7410925482dcfbdefc4cc1be3985d919d67896a
font_02_sfnt_off00011e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 7460 bytes
SHA-256: e305a447b83959fa908c12322a4d3b0b08109dbe3c38bf44eb6284b1bb1e3dbd
font_03_sfnt_off000132e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E2 14424 bytes
SHA-256: 3994d432dcc8eb0e893c4f9a6b173d88b445ece1fd4ca5ce80663937b61f619e