Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9db046cb6004bcb…

MALICIOUS

PDF

183.4 KB Created: 2021-07-08 03:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 44190c9754dd1ca1abfe89019f3698ee SHA-1: 67bcb8dad2b3295b982256f14023ac059bc892c8 SHA-256: c9db046cb6004bcba6b6733499a72885bab3a0ab7e1488fb64b459b46c9b3c66
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories or disposable hosting. The presence of numerous links suggests an attempt to distribute malicious content or phish users through a variety of deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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 http://mintaialuminum.com/d/files/19816915435.pdf In PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/uqims33is9e5bpejrjrstvseo1/kupesogutudinakam.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/bb6ab0db04868c3a0a5b8576a95b0eee/zefifojajaga.pdfIn PDF document text
    • https://icbacademy.com/upload/files/29239547978.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/be32b1b453a97ed5e6df65c4aea67eef/46491726685.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/kmh7uh5sm9dqlds4dfkigsch9c/2354156822.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/jiveritamonotibuzotipefa.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/03s9thlfus60hjjiu6n8f6rjha/78870559338.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160807738e07c3---jamofukokurukedazokuje.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84607ba826---rivoxezesuwolariku.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0d0057b48f770207e90ce6a169ab8a97/zexiloxifirepuwinobu.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a9f577205---wuwetawinuje.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/44437806492.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/15169807584.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a0e674e0a---56807486696.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/ketamume.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a5817f048d2ac118f2d669868456b181/zozetajigelodobo.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/vofevasekepozivo.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/28938408205.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/92223442611.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/gasulifojiwexovijevi.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210630_DF9015F5197474F9.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/52218729413.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/tl0ceoo7v2r1knj5jikc4t4322/73418041429.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a021c46b00d---68332094857.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+storm+sister+pdfPDF 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_off0002747d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2747D 16972 bytes
SHA-256: 0944c2d5ebeb49e406dd4743174433adf0e6b6be7a5e76599a4de38cea13c86b
font_01_sfnt_off0002a0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0AF 10416 bytes
SHA-256: 285b6586851534f1e5f9e8900c8460d1ab01919488b72680f2f26a7d00cb8fc3
font_02_sfnt_off0002b84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B84B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1