Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fa551ecaad9cfe…

MALICIOUS

PDF

81.6 KB Created: 2021-09-14 08:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62a5004065c2cbd519f7e4c2a676ceab SHA-1: c4308e67ad533a5a4e741a61740eb32ab46999ec SHA-256: 80fa551ecaad9cfe1c1faba974da1f4de657b2dc9101b459c5e45cdebcf49188
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of external URIs, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=access+windows+shares+from+android PDF link annotation
    • http://tauroconsulting.pl/userfiles/file/97480994819.pdfIn PDF document text
    • http://ktcz.eu/files/files/41863808789.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/99938846264.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/19919326343.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/43300329252.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-13/20210913132644341019.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5fcb1b891---69861882714.pdfIn PDF document text
    • http://videlec.be/ressource/file/96992702864.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/32936148257.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/jimesuwukegulezoze.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/pokemi.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/83183b54fd336f3289e54ec723270bf5/47902412571.pdfIn PDF document text
    • http://phanvienphianam.com/uploads/userfiles/file/dikekovabijizugemuk.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/lezekaxil.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/wowudigaxunuguwumabunik.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/80456976022.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/wimapofaniwu.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/newona.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/nawuvizovonivawu.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/90771695562.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/nudabadigumow.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/zukesinizixolinikupekowu.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210914_277451852ACCAEC1.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/mabesukum.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/sadetonipokosobivu.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_off0000dbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 17120 bytes
SHA-256: 1c8fe98d0dc9f5c00d8c201619a5dc38e7e981d237f25a5a648a4fc2b27bed11
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 10664 bytes
SHA-256: 5435d80e8f21b510245e77259192d49570321a3a396bbb0f7862db2dfad864f4