Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb170463da579e3…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 21:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f62ddd817f994e9db4b09da61a5129e7 SHA-1: 91e4758fd93cd522a2c7c9b5196fb9873bf17fd7 SHA-256: afb170463da579e3c9ee7a1de0b8305fd28c73b103f06a19ff51b30bd153cd6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to lure users into downloading potentially malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://clifestyle.net/uploades/userfiles/file/jidiwigazowowivire.pdf In PDF document text
    • http://mlsconsulting.net/cms/files/File/wavukixemudafinilela.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/532690ecd68d2f2a66cb35b0f09e44a4/92012596364.pdfIn PDF document text
    • https://ags-car.com/upload/files/39804677798.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/72080496314.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/poximenixozagorulavizefe.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/54905489464.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109011710015531.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/92136008691.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/latutugomofexavojifu.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/25492631900.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/turunukowikoji.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/49528396313.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/runatanotodosonaje.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/novexibimuve.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/57139847408.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/62773679965.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/kobigawula.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/nukexogimujup.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/nekujigiguzimapugotevisu.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/5t34dte00scufbpamrcrc4kgjp/84728225959.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/gedujubezetawilifimon.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/96889430081.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/sinolazosamil.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/qnhhro4esci92pc6siees1dd54/jifevejusoganipepekubozi.pdfIn PDF document text
    • http://regcureguide.com/files/files/fepabonusigarizimunufaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=free+download+car+parking+multiplayer+mod+apkPDF 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_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 11060 bytes
SHA-256: 5d6435d00392e87f467c3c0fd48cf32e2738f479dd84d71eb32d19db40e268cf
font_01_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 18324 bytes
SHA-256: 3349ae4ec2fc912103ffcad1458e44edf96dbd6b56e8c40d06446de9cd9d5b65
font_02_sfnt_off00011bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1