Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45517463645e22e…

MALICIOUS

PDF

74.3 KB Created: 2021-09-21 02:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: da99d892e728c4b30090989c61eaf68f SHA-1: 7aa5d2f154b56dec728747b11ca6a969d774b76f SHA-256: d45517463645e22e2c348a111691ad26e0f4bebd1da833071e64a03f3f2c3009
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised CMS uploads, suggesting an attempt to trick users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144256512a90---lejurumususu.pdf In PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/maxarex.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/punalexovojiwimowareraro.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/nopuzorivobawebokomu.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/67051865863.pdfIn PDF document text
    • http://robedecreateur.com/img/files/87101347310.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/foserofupolem.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/dododibolefufom.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/42245913568.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d346949635---rugakupakute.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/51351336762.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357a27e5623---24155998799.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/51618472143.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/kosoxani.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/vibugemulukonimad.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/96940493650.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/nodixetojowiluxabune.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/kaparogufado.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/50610295196.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/73677571763.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/38849322419.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/mejamuvaxinok.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/pivevapekidejexut.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109040849051651.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=train+simulator+apk+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_off0000c064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC064 16808 bytes
SHA-256: 11134d3a2d29f4e7177b3c68dd76cd7b0939ebbe4f18d08a42189032e08b6255
font_01_sfnt_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 10660 bytes
SHA-256: 29243de28892ed6224bc20d970587347f78a159562d59219890cb16591c3f73d

Open this report in the interactive analyzer, or submit your own file for analysis.