Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb804aaee2c593c…

MALICIOUS

PDF

129.5 KB Created: 2021-09-01 23:35:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7eeb76c16819e173104ba7270e343c13 SHA-1: b9a6e51dcad77962ded745822e519f10da82a37f SHA-256: 2fb804aaee2c593c402ccfab2cf5fe27d3475ec954646a50f19e4d259eec1678
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence score support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://boldogelet.hu/media/xabumumafuwelixenonuj.pdf In PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16128a1a71b735---xekobadazapazenoki.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160928666ac35c---14393565956.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/42398187596.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/65727314979.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/mibapanalapowebigedig.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/54262103436.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/63849814041.pdfIn PDF document text
    • http://cjatkinson.com/userimages/fowuvijixepigova.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609423ab612f7---ditixeberejegirijak.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/30259389312.pdfIn PDF document text
    • http://jar-ted.pl/file/nujofeliluw.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9fe41b372---larijozoludufizitofi.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/65375160277.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/mesobakapamix.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6136c1d29e---15881393477.pdfIn PDF document text
    • http://hrudolf.com/userfiles/suniru.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cca69e23b2---disiza.pdfIn PDF document text
    • http://beateromer.com/bilder/file/93239037943.pdfIn PDF document text
    • https://onecre.com/images/content/files/vewixeja.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/15832618241.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/086c32fda41b07987d048bbea1c51e11/momevobowoloziniv.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/xaramozovizujebufodise.pdfIn PDF document text
    • http://ebara.com.hk/ckfinder/Zenith/userfiles/files/76167604224.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc81a25064---89041356600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=i+am+always+with+you+malayalam+meaningPDF 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_off00018387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B99 24556 bytes
SHA-256: c5083c0b290526247561dd5ec0d07e1c67ca8a0a8146a7e61f12db15273eda06
font_02_sfnt_off0001dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC4D 10704 bytes
SHA-256: bdc200e16f9bb134f565f8a0172ced7ff2560d3e77a83a0af1dc241939ad4bc9