Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44cfd3224f5a0f5…

MALICIOUS

PDF

84.6 KB Created: 2021-09-10 20:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3a9819ee5c5d869ba8133de33c5ecca5 SHA-1: 587da73ef164620f4e9e85b6c689de437d270901 SHA-256: d44cfd3224f5a0f5a17c8d2d458be3213920ecfa1b3e9556574a3694fdd0afa5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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
  • 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.
  • 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://ewastexperts.com/userfiles/files/2022323339.pdf In PDF document text
    • https://bazk.info/public_htmluploads/file/71656004633.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/44129360966.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/45002653437.pdfIn PDF document text
    • https://gdaniec.com/upload/files/momiwapibozogurojojapoge.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/83385714573.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/mekirobumupewoketad.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/47724329265.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/70616684813.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/m6akef1mls3p4b0toc235sfg3h/24838825048.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/pajawelatidofukigixolov.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/69105894574.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/86841575752.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c4506d226---feridoteradez.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090607150570554.pdfIn PDF document text
    • https://xn--72ca1bzcdf9cg5df4n5a8cei.com/userfiles/files/61840192033.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/zerara.pdfIn PDF document text
    • http://nguoiquangphianam.com/uploads/files/6038945972.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/wejavulelelewuda.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/44051228220.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/25851816301.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135525e20dfd---zololawow.pdfIn PDF document text
    • http://veitali.com/upload/files/51121937293.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/90971217313.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/21637354013.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ea419b3f2796e3a2c091c211af6663b8/32744442311.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16130868eb50fb---xinonasuzejobinur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+twilight+saga+online+full+moviePDF 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/rightIn 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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 10776 bytes
SHA-256: b00d165a529439ad7c65920f9453e2a7cebcb53481fa8d88214708be79491f1a
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 18596 bytes
SHA-256: 0f2e318a823f9d923e1ddc79a24ef0efd3ec2748a9682ef2558bee6e04087227
font_02_sfnt_off00012dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1