Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a85cc407feec686…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 13:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5fe15f3da9121fd27bdab610d5f7d0c3 SHA-1: f390cc60d640f5a4f25faa7e3716352236ced477 SHA-256: 0a85cc407feec68637de128b483701aa6c9052f3a3d5bf82a5900d7d35e9b458
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to potentially compromised WordPress upload storage and other disposable hosting, suggesting a phishing or credential harvesting scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of redirecting users to external sites.

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
  • 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 http://sooam.com/files/fckeditor/file/16537268266139c59d04e74.pdf In PDF document text
    • https://2acontractor.it/images/file/lorinugapik.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/74074762297.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/37092466205.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210906005034_m61g1x.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/36417795668.pdfIn PDF document text
    • http://gibisch.biz/files/files/tesadureririxovotunoviru.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134986faf3a1---jivabolonesefonofuniligid.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/3091569182.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/bewawisaw.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/fisugel.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/72bf9e257ec005d1c2b4b2b397a265cf/3904066127.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/14985931851.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/65211642837.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/33423595582.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/29022261020.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/vufagumalujodilimowadeb.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/69649148765.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/133d1688d042c80ee65e77507c864014/54852349524.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/227ea9950b406ec9ac9978fce03eea36/xefenepokuramifem.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/80366628428.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/20111655963.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc2f8c5400---10281652212.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/63144609352.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+night+watch+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/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_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 17412 bytes
SHA-256: d08e6e5b06d0940406eec071ccada4a62a31ed624aa530a3c0742bb7cbc5a879
font_02_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 10732 bytes
SHA-256: 1ef478cc00537c12282a134d217b00f77d93b8ef65ab299f36e538b44811ff66

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