Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e09c16a7823f044…

MALICIOUS

PDF

77.4 KB Created: 2021-09-18 02:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 029ac029a79782337c909d678163ae52 SHA-1: 5c40f8814bdea21f07e2d5826442d763017860dd SHA-256: 8e09c16a7823f044d344258fc8d6a87ee096152f1dfe21485522a75aba7db628
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites, suggesting it functions as a link farm for phishing or malware distribution. The 'SE_QR_LURE' heuristic indicates the document may instruct users to scan a QR code, further supporting a phishing or social engineering attack 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=qr+code+for+beyblade+burst+legend+spriggan PDF link annotation
    • https://conexkarvan.com/cache/fck_files/file/mubuxutabig.pdfIn PDF document text
    • https://sitarasign.ir/data/file/22970909787.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e973d5818---daribuzolexam.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16137c28eae565---65475493530.pdfIn PDF document text
    • http://pneusmarene.it/images/file/16629215538.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614387042a232---fadava.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b686cc4ce8899f90a57bbe47ce42ac8e/zogafediduzefukoz.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/24769081396.pdfIn PDF document text
    • http://gapp.fr/medias/files/momedifilipagobuwefak.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/taxujufufenow.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/nofanefiraxozoti.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/72893948275.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/jeniwuxozupomoga.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/lolaxomuviri.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/74171571124.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/38091271543.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/6764528682.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/59656890203.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57369176631.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/nijefukiva.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/wuvaganiwepafil.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/fodufol.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/97711870729.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/uacbfthjm4tqpl0jtv85877ff6/jegakudabitujuru.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/tavunim.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://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_off0000c3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 19192 bytes
SHA-256: 3dde5621cff3cddbffecf02619873a32fa7694b5952d5f00657e90344e5aa5dc
font_02_sfnt_off00010dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD3 11208 bytes
SHA-256: ab76f8dae4ef87da8246cea0c93017fd8d9eee456650878bcd089e8697a2db44

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