Malicious PDF — malware analysis report

Static analysis result for SHA-256 4607702b10108223…

MALICIOUS

PDF

109.4 KB Created: 2021-09-23 05:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 021f24525a30923b77acec2c772701a6 SHA-1: a75d3d8f44074fad1d6e689e0e4506a9146c3f08 SHA-256: 4607702b10108223c0f3fef9182a2481628e5c8360df47f56acedbfa2588ad52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains numerous external URIs and is structured as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure strongly suggest an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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=index+of+24+season+9 PDF link annotation
    • http://xn----8sbkebltdkywd.xn--p1ai/ckfinder/userfiles/files/91219233386.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ccrl2fqvs4m8qhvv5e21rv9p42/28664448908.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/dujetimeruxavukowomatonem.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/rubujepuremekafeko.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/vakuvorinewusowosiz.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/1370688686.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210922210726.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/pikuxafejezukepexovid.pdfIn PDF document text
    • https://airshow-bg.com/file/lesajemudozugarimej.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/94211780673.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/75367557798.pdfIn PDF document text
    • http://unseretochter.ch/images/file/18384372275.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/96621680539.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/sotinevovijufigulefitelob.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/pidowugulub.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091008443261.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/51928036076.pdfIn PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/90669823358.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/jedezizuzufatobuno.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/gitopo.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/40005110911.pdfIn PDF document text
    • http://pnalog.ru/images/file/vapelupekuf.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/xujumanabazakarudamewuj.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/fudabizota.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/2489697732.pdfIn PDF document text
    • http://mobiliteit.nu/files/91088404905.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_off00014457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14457 19496 bytes
SHA-256: 8905274a3a421e60e70c0cd9d0e4b3a18a6e5a5775e48a84e74526690ba25122
font_01_sfnt_off000177f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177F7 10432 bytes
SHA-256: 084f9a65d4966e94d0bc4adf861b258d12af71c2e2da3c3efb5276ff4d41e7f3
font_02_sfnt_off00018fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1