Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3f054a8dbcce4d…

MALICIOUS

PDF

81.8 KB Created: 2021-05-13 09:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11b95b469a9192af365a4ce582ed6bad SHA-1: 754c91989a92949cd2600a26ff0b64d6efd31093 SHA-256: 9c3f054a8dbcce4d9726041794f0760d8ced605aca79dc8709021ea9d1ac93e5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=cepher+bible+app PDF link annotation
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/lisafonutewad.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/thailand_public_holiday_2020.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/1cm_squared_paper.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/ruzapelujafeziw.pdfIn PDF document text
    • https://nikirepe.weebly.com/uploads/1/3/4/7/134743809/5455318.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/ed02d696b2.pdfIn PDF document text
    • https://turudesufexo.weebly.com/uploads/1/3/4/1/134131379/13327d6a.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/1469064594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e69ea8-f605-4463-addd-927e919b33b9/lufexisenido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df51ebb-3775-4c31-8401-24109bd03708/how_to_use_braun_ear_thermometer_6013.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_8d1d066aa3544a62bf45b7fdd1690954.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d988e0b8-6b00-4d06-a82d-76cb70b4e39c/40765026386.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/neroferodakexirowele.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_2d20cfbe682a49de88d8951d6f9d00ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofiguj/gloria_victis_beginner_guide.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_fcefc1777c9c49a99b8c0d50fc82ccdf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7524cf3e-0817-42d9-bd80-bd2e70aa4e9e/yamaha_dgx_660_lp7_bundle.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/79733373458.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_7a4fa4a6835b4c7190b88572c5eb5f70.pdf?index=trueIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_32bfe8eafb0342ada4eee48e10530361.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/satitewaboxata.pdfIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_908fe03163ed461e971c608f9b591b05.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_58bd015c637b41f486cbac2609cba00c.pdf?index=trueIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_589a1c3a181446869850b9fd08392596.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd1a84b-9f9b-4bda-9ece-c2ea88d2d445/best_rated_electric_pallet_jack.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 4772 bytes
SHA-256: 3e45155d86c1ec46536e94e1a8ccdd00ace81fba11520b122d9fa0813ef74255
font_01_sfnt_off00011257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11257 11628 bytes
SHA-256: cf16fc0e666cdb5b69ba348241a43b48ce850aeceb6bfbcb8b7ffaa945be2ab0