Malicious PDF — malware analysis report

Static analysis result for SHA-256 063dc6875762de1f…

MALICIOUS

PDF

89.6 KB Created: 2021-06-30 18:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 83524513f2ef1f6bfe560eac83066978 SHA-1: c41fa9f013d276cd2343e86db42dd4ebaf1f977f SHA-256: 063dc6875762de1f652f8d1f2d69b4ae8af3ab77dd389acd0c35c152e3c8a451
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://glbtrader.com/userfiles/file/29494798494.pdf In PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/09d38e3218f6484bb982d7efe66c3858/25616185142.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/86755341992.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d87d9254cb---76516466518.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/f7bb491566daf270b2dc3957a4c7bb93/mumomuzedekadoko.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/zojufogamefa.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/12d6436e7e4fca25b8b6c034b097763b/35232233092.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e9258aaf0---69435574997.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4cafa35cb---goxanufekadomar.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a694e5540ab---fakogigunakojitinotajedex.pdfIn PDF document text
    • https://aashianarealty.com/file/fexuf.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9aa8e3153---vofid.pdfIn PDF document text
    • http://amandamaitland.com/images/file/58442915514.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210619111139774241tkeir9.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/90679891079.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f1e7d587788dafee969ad5ee078b0dc7/vesosaxubodukegifilezuku.pdfIn PDF document text
    • http://c-amc.com/upload/files/24470320353.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088280a27f13---56146079566.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/3608896237.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8f97cb34ca85546c4ac9fe73e1e0319b/jupefosoponok.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/larovedemal.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/11s7ll8o6nd22senekofqlts56/kisebijuzez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=erp+in+supply+chain+management+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 16624 bytes
SHA-256: 3fa152382423af5f6342853ef210ba3f15d82365864139630e943c159f8d5c0f
font_01_sfnt_off000127af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AF 11144 bytes
SHA-256: b59d98fd801e9e1120dbfd2a29e22b6a72507f674c46398a1f96cfa3d16bc95a
font_02_sfnt_off00014158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1