Malicious PDF — malware analysis report

Static analysis result for SHA-256 beeedc404e4934e8…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 00:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8c60e6dd55b0ef86b234cdf77dd9b616 SHA-1: 99674c2448e8ddb617db9e35a13550bf4832ed3b SHA-256: beeedc404e4934e849e54ee0884a22b00d1f015726e4275904e76c0bab1bd4cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, often employing JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=auto+clicker+mod+apk PDF link annotation
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/verubivozenudukasi.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/ganaja.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/vupuwupazagubu.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/47401950209.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/88755576066.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/jowiguvaxozorebema.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/kobijokabetazozi.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/gupisa.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/jewegobobokurufo.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/juwedelubufojemepugapi.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/lififakubufujolezipopu.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/runanodimagosoxaja.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/26881324316.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/46efe0746335c078af2747879dfc5a24/fotedimigakawiwo.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210902180302.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/8ceed057d812a52106f7e18c808aba24/80798301304.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/88051403727.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/fedofi.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/39644052039.pdfIn PDF document text
    • https://kawanmto.info/contents/files/69901639626.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/fativufivexexixer.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/99434354982.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/17998096639.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/62229957521.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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 10576 bytes
SHA-256: 2fa9c8e74d20e65f230d717ff9c9ecea56762cfc3b2171c3aeb175369658edc6
font_02_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 17500 bytes
SHA-256: 4eba5b409589ea95f9ada8b09a662dfb063497548ab46b4adc54b483b36cdb3c