Malicious PDF — malware analysis report

Static analysis result for SHA-256 5486800b05a8f48a…

MALICIOUS

PDF

122.8 KB Created: 2021-06-29 13:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d76a85047b94eca562d66349c1638b6d SHA-1: b01e57dcebc561969b10d7190f7d1c882b02bb58 SHA-256: 5486800b05a8f48a5c42a6a3492e1a9bccfec3d81a7c750872875c5726c7343e
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that point to compromised CMS uploads and disposable hosting, suggesting it is used to distribute further malicious content or phish users. The presence of multiple external links and the 'link farm' heuristic strongly suggest a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://111-orte.de/testarea/cwsCMSlight/media/files/36281786867.pdf In PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160882906f0545---vagatuzatopaxiwifi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706fc956db6---tilolibutulipesofoxi.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c756172ba1f---mozotekuvirekefupilagan.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a3f1132cdf8754342f5ac6880ce79720/42581789773.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/33474719534.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/74816364660.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///92297271569.pdfIn PDF document text
    • https://marosme.ro/hirek/file/vobusewala.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c68e285a7e2f4be6ee7d0c02fe0b7ce8/47611534803.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91ee7245bf---26792889055.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/16640993964.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/5654818675.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a8cdd63b368fbfbd3b970bf97720e374/29103195245.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a933e34e---dujepefuva.pdfIn PDF document text
    • http://dzbnf.com/upload/file///tomoxifitawukunatodedoro.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/b39d378542858ece6aa82c5f9491d1e6/zexabijupadojigojemuzo.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/68425805071.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c694b1048fb---depaxagejugexura.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16088cc4cd4193---doxumowerumifomupuburi.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/xarodujenoxulodezixedig.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080b18080692---20258094065.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/migigedemibupa.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087664699ea1---42952259411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=trading+the+markets+the+point+and+figure+way+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17964 18348 bytes
SHA-256: 1948ff3ed3072c342ed8eafecebe419e823706a8288482e476e6190ba1150e5f
font_01_sfnt_off0001a9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1C7 11252 bytes
SHA-256: f6d0e6783c96954ec5ffd2062a5fb7dce6f556a5bb04da70f15ca8e05585ae7a

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