Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e5ef4e38be2ec0…

MALICIOUS

PDF

81.2 KB Created: 2021-09-20 04:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe2e42d144a111137c34fb9b0e0ad5e4 SHA-1: 14b8cc30c6db9f63a1b0a6cb46ea3e3d68ac4b14 SHA-256: d5e5ef4e38be2ec021f6b34f8a510a7630f42308aefbb0a58d942dc9e36c21d8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' directly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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 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://philabc.ru/uplcv?utm_term=coolie+no+1+2020+full+movie+download+filmywap PDF link annotation
    • https://petikdaun.com/contents/files/rawokaripi.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/rufujinoputezijibi.pdfIn PDF document text
    • http://chemicalengineers.ie/images/wudatuzizexifowo.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/rosidufawizami.pdfIn PDF document text
    • https://carlojans.com/cms/file/51912371995.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/33815120859.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16131143101075---49400072130.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/xabumigi.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/78884101141.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/kexipotiguxuxozazibag.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/titaxixazofonujamum.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/watemijufugurudagawem.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/kifupis.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/20671593470.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/wofusajarediluzalafesirip.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/kisukenuvevatikos.pdfIn PDF document text
    • http://classtool.info/upload/files/fademepepopitoje.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/sugap.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210901/files/20210901211709.pdfIn PDF document text
    • http://cbstav.cz/file/dokefiz.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/zovutevixobuviguxi.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/49756262080.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/0k74cpt0m4053m27mag8earrcq/bepelodadinozuj.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/munidepogeluleku.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/tufeduv.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/73323183919.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD837 17264 bytes
SHA-256: cf2db6f768943adf010120000dee4c267e74219e10f1f3071e2dc28c638eccba
font_01_sfnt_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D11 10984 bytes
SHA-256: 9ace276f51021b761b00c0c662718eccf25caf8781843f39c5dd3036ebbc2759