Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f15b33d08ef622…

MALICIOUS

PDF

84.1 KB Created: 2021-09-15 20:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0b63a1b7c4531acf24c41766dd1e5aa SHA-1: 4ed83060ba524165f691153d7d32af5fbfffc1ff SHA-256: 01f15b33d08ef622a12c1beeab91bffdf9759e8866f98fbcfdb27733a9ff6281
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a link farm with numerous disposable URLs suggests an attempt to host and distribute malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacsonsfurniture.com/userfiles/file/sopepalil.pdf In PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/64210802680.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/68189029907.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/73401973680.pdfIn PDF document text
    • http://enricobarraco.com/files/74897624134.pdfIn PDF document text
    • https://rubfila.in/files/file/miforifedegajizuk.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/27201122538.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/acb159508b5ec1c9a74b9bf48c10e9a7/nuvibuwexefi.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/63300774859.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/lasutoxe.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4374bdcec---foxadosusisejekox.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/ragasomizekokusim.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/66810137137.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/4124739012.pdfIn PDF document text
    • https://edusfera.pl/upload/file/nepetevevesemegiwemowuriz.pdfIn PDF document text
    • http://edallyshop.com/upload/files/xigalikewoxamilarujejelun.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210901215641.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/sikikelosebokowip.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/56799850086.pdfIn PDF document text
    • https://coevent.ru/upload/files/kudesadat.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/80419003408.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210910_59F251F7B96A25AF.pdfIn PDF document text
    • https://brukspec.pl/upload/file/84809265464.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/16225452186137b8b394949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+conjuring+tamil+dubbed+full+movie+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_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 17692 bytes
SHA-256: 710f25fdcce505d68debe7ee135e17614e5788473420bbb2aa9a66c343fc51ed
font_02_sfnt_off0001282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 11240 bytes
SHA-256: a8e94f431fbeae808468b628aef2c6046ddd30d7dcf53e72f87d4a66e20a92c3