Malicious PDF — malware analysis report

Static analysis result for SHA-256 353e0ae2de1b4b32…

MALICIOUS

PDF

79.2 KB Created: 2021-09-16 21:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e158c01012c3b335b275d35373dd6eee SHA-1: 008db11070e8d8ba4b7e3b7560e7f4be0c22dd15 SHA-256: 353e0ae2de1b4b3269a40459018e26223de9851c7f29c4aae7f9fbb60dd4f589
134 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=how+to+get+internal+memory+from+a+dead+phone PDF link annotation
    • http://seamcc.com/UserFiles/files/75172097956.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/98490160349.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/tufegeluxiwunemi.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/fofijiluliduwuriketu.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/nowapukutemipab.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/86679180497.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/munirolovitaji.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/23859374048.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/magusonoxinavofiridoxis.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/80601029713.pdfIn PDF document text
    • http://ore-processing.ru/d/files/67555401450.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/17266244422.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/jesiva.pdfIn PDF document text
    • http://kammed.com/userfiles/file/40365873834.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210909165503.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/wufugiz.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/92288519316.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/54937060388.pdfIn PDF document text
    • http://tai-group.com/upload/files/92391230776.pdfIn PDF document text
    • http://flathead.herosuite.com/userfiles/file/75046539237.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/4791875916.pdfIn PDF document text
    • https://ratodua.com/contents/files/runofukulesowuvoxi.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/pumovifadekebojixo.pdfIn PDF document text
    • http://stefani.cz/fck/file/puzulovulebofavaluketoko.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_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 10968 bytes
SHA-256: ac57b10dad34772cb55f8f1042cca90e3b3ec6574225ffc42f6d5c58e7ec7866
font_01_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 17200 bytes
SHA-256: dbcf4544a996e7c1251afce1129b8f963c3605b27704beb524e258154bb3c706
font_02_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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