Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd063704b8e91b4…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 05:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3136d43631076b51d41b576a149c8ba5 SHA-1: cc4b16e1d7073b132a41dcabc744dc146f2356d6 SHA-256: 0dd063704b8e91b4864aa9eeaba511e4d09502ef1d6457aadd2570e0ae465225
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. It contains numerous links to external websites, several of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://huntic.ru/uplcv?utm_term=touch+screen+gestures+android PDF link annotation
    • http://exosushi.com/uploads/files/pimotinewexadir.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc9c815139---34901782176.pdfIn PDF document text
    • https://riolisboa.com/images/ul_files/file/hQDoqCjMBpV1.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/085fadac0890daed54d437e4d4a31d7b/ridakosisigezebewuxuvam.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/wodujokufizikejuk.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/tobobajegedo.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/semapejewaxokudox.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/kepitenimomubadevo.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/toribejif.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/vibafadowomajom.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/romavimosekoxeduwijejefe.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/92237168858.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/36852597146.pdfIn PDF document text
    • http://edeins.com/userfiles/file/38770058205.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/48071594728.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/sebetadopeligolaleri.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137016538dd1---zajim.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/68518212160.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/ximapenekibilulub.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/64822910129.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/vavuki.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614137e1c751d---30382373057.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/zofedodux.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16131873ddc8be---74866103444.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/pigopu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d587a2b74---temasulofisalowu.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_off0000d50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 17472 bytes
SHA-256: 53f71f3b8aed820241f1530599727e3396f2fd498a9f8f0aa89fc852dc5285f8
font_02_sfnt_off00011a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A78 10668 bytes
SHA-256: e1b08ee1d8fb53d21a408f86cb590319efd5de80e877ef82611d899abffe6269

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