Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabccb26f30af9d0…

MALICIOUS

PDF

91.4 KB Created: 2021-09-13 22:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c929615ff3455cb64521970e3c156cfc SHA-1: ec447f8db2ab1d213ef38cebfe78c659b14a0831 SHA-256: dabccb26f30af9d02363d4521b31c6fed4ea5a7072f1de209194d9f3851f9972
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of numerous embedded URLs, many pointing to unknown or potentially malicious domains, suggests an intent to redirect users to malicious content. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://satyavnetworks.com/fck_upload_images/file/kezigu.pdf In PDF document text
    • http://gyogytornasz.hu/editor_up/bopokodarokexaketeka.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/22550753481.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161351bf144173---89154082928.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/7085916643.pdfIn PDF document text
    • https://kultmotor.hu/images/files/9000878245.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/59735771346.pdfIn PDF document text
    • http://africareview.in/userfiles/file/zipotubo.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/97021985490.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/remodomekemelukap.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109090311257632.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db25f7d832---dovatowalakupobujo.pdfIn PDF document text
    • http://orenprom.com/img/account/file/70702669564.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/39338867946.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/6239590554.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/44520455807.pdfIn PDF document text
    • https://kawanmto.com/contents/files/86662601834.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/notapulovobabosebiw.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109100733171182.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/91251558561.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/81703829980.pdfIn PDF document text
    • https://hse.tw/upload/file/68777843281.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/tixofineleparosiwu.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/13096685515.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=isaimini+2021+tamil+movies+downloadPDF link annotation
    • 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_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 18944 bytes
SHA-256: b3eaa6ffac9915d4bb3cf17b2e7b9d71dcc11f04e67117f22a54ec33f7539381
font_01_sfnt_off00012ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED1 10708 bytes
SHA-256: 91ee891545f469867ea286636c29ec25abce6081f613f91be5de61054fc8ab17
font_02_sfnt_off00014785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1