Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fd18e53c9f77f6…

MALICIOUS

PDF

89.8 KB Created: 2021-09-20 07:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2d62f88eaf234bb880ac20461483c7e5 SHA-1: 96f75a69fe80ca0abd01ac66d369f2d8e0a161da SHA-256: 07fd18e53c9f77f673e0038cb5fc890298b7a5911a1b819bac59d06781360694
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm on disposable hosting, with numerous distinct hosts and UTM term redirectors, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the link farm and the detection names suggest the PDF is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/39291280392.pdf In PDF document text
    • https://ph2020.org/FCKeditor/file/jujapafiluxi.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/pafavokavibo.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/7466118626.pdfIn PDF document text
    • https://tomaszbizon.pl/web/uploads/files/sixowixibarinopuj.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/pefinawixexad.pdfIn PDF document text
    • http://agilesolutions.in/uploads/86340148225.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/bedexa.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/38826848810.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/lirogilezetogumubosi.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/79937278082.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/sujevaxu.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/lotinalodufimomab.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/fukixafukenilifot.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/54034789394.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/sibipufilesawutusogoridu.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/fepimupefurofirezixaxun.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/zufavedekiwarotosuladigow.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/ramekinupakirukugun.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16135ea166b0bd---febudurofalojedapozufi.pdfIn PDF document text
    • http://debten.net/UserFiles/File/1534421652.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/rirugilisanux.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/59378603348.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5283aa8d0---20255004814.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/wotogitojigulotapudag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=watch+demon+slayer+movie+mugen+train+hdPDF 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_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 11092 bytes
SHA-256: b39008dde5c43361806908b7880581ce7ab9d0a2c9fcfe7483b82a8fccd0fd74
font_02_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 23020 bytes
SHA-256: 8a48e2007f664ec55d10f5fbefaf3d84fef1d78ccb25867c899f67c7377baef5