Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aee6d5e8c30d2a6…

MALICIOUS

PDF

79.0 KB Created: 2021-04-13 21:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d0f0bfae5c0da4a77206ead131f10a7 SHA-1: 1caa902cd64f9c8037602fc10ce2c409ee194ecb SHA-256: 5aee6d5e8c30d2a67ffc2138623811055bce99f0d9a90d31495e66f1398c411c
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 0.9961

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://lozipotod.ru/strik?utm_term=hp+laserjet+1320+driver+for+windows+xp+free+download PDF link annotation
    • http://rapoxarawiwalo.sportsontheweb.net/64592994879.pdfIn PDF document text
    • http://iranomics.com/wordpress_user_management_plugins_freezene1.pdfIn PDF document text
    • https://pukokisawar.weebly.com/uploads/1/3/4/7/134749025/leluxol_loduveza_zuzoxibirup.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/sistem_informasi_akuntansi_manajemen.pdfIn PDF document text
    • http://yourcy.com/71218004870wmojz.pdfIn PDF document text
    • http://pubgmobiie.com/jbl_stereo_speakers_reviewvidow.pdfIn PDF document text
    • http://giwewewobarijis.22web.org/gukegisozajepulakojagole.pdfIn PDF document text
    • http://arnautmebel.ru/71940609392sx9d1.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/nujinumuxolugo-jemiwavuvuxadox.pdfIn PDF document text
    • https://liwitozawaben.weebly.com/uploads/1/3/4/0/134042828/kadipu.pdfIn PDF document text
    • http://kurs1.xyz/87457315760g4moy.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/56122106421.pdfIn PDF document text
    • https://sitobewabaxepok.weebly.com/uploads/1/3/5/2/135295681/pekegiwolikofofubux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f062691e-7c63-4a95-9c55-26d6915bb024/71191423313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59396aa5-262d-4f44-9571-e8e50b05c146/how_to_update_lg_tv_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7b2082-6aff-497e-94ed-db249968c63f/83200162450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255b88ec-7446-479b-bb8e-0172fb53cc65/curse_of_the_azure_bonds_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99a8f29-cc92-412f-96ef-b32a9f249d2b/83363626609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d5de11-4bd8-481f-b3c2-aa7492dd0770/murray_riding_mower_belt_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18010e93-cd7a-4f06-9dfd-451a9888e4b8/nikaboru.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/rekezedubosejet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8cd71e-3b39-435b-a759-6eb0866f2f67/jonatonadujegor.pdfIn PDF document text
    • http://ralepixevoz.epizy.com/air_source_heat_pump_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986bb82e-4dbc-4da7-a18a-03ecc8907421/35266849349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a0728d-237f-47e6-8a94-e682e159195f/namukabutulog.pdfIn PDF document text
    • http://nalosig.rf.gd/57921500542.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_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 5780 bytes
SHA-256: a4474d08a688d1b9ae391207ee3791a6c46571de64d9fc75b76957443c627014
font_01_sfnt_off000109c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C7 10456 bytes
SHA-256: bebd9917b2e005289d3499e70661fdbe89eea42318e9e9a19551378f7bf63b48