Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a507287cac8aca…

MALICIOUS

PDF

97.1 KB Created: 2021-09-17 12:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79f416dca03a2eeddcbdbf14b043834f SHA-1: ea64b00955c0acac5f8eb6747908779f774f846b SHA-256: 56a507287cac8acae27dfd8bad39979db410a6e1d32694bf48435b4939c8535c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, some of which host further PDF files, suggesting a link farm designed to distribute malware. The presence of a visual download button lure further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=gunday+movie+download PDF link annotation
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/jdl8v8pbdsskt1hucegl69e7pu/bofawogurupuvogoxi.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/97645976614.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/75752030354.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/tjq3pkthhg52v09pgvbip4bcvohp2bl4/2253219952.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/pizuwopowogiwusu.pdfIn PDF document text
    • http://mousike.it/img_ins/files/guxilokolavi.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130461a05324---busizi.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/11937876336.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/6965420625.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/46693536601.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/32068908778.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/wiloverumerimo.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/48640600764.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210908_94CE6E7AE18B8F93.pdfIn PDF document text
    • http://edins.net/userData/ebizro_board/file/zamupobu.pdfIn PDF document text
    • https://tl-systems.hu/files/files/jilemum.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/63541725691.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/96023686276.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/wivokosolaverululupu.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/buvaxolodilemuvufukafifak.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/5800810388.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/juloboj.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/xakunukojopifa.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_off000119b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B9 10448 bytes
SHA-256: 62239973b7462e70f02681134cc60b6d742906482128642603c6528e06bf2f0a
font_01_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 17460 bytes
SHA-256: 0efbbc00d3041b6e69cfc64cf2908d1649d31021a186682a5dc59ee7635fd7c2
font_02_sfnt_off00015eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1