Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc38ef652734e38…

MALICIOUS

PDF

76.3 KB Created: 2021-09-17 14:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b00edb038ca6eddda6b61847e90c80ae SHA-1: 8ce8bdd4a6addd5e7f6d3c87c7ac3aae4d54f45e SHA-256: 7dc38ef652734e38b47fc3950984ac40b59cc362e8c26bce738699a3119f0f04
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://voijin.com/userfiles/files/divoxogezilelamu.pdf In PDF document text
    • http://lixupeng.com/uploads/files/76930629616.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/40818596758.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/59376300042.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313fea1abb7---51381134413.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/jakigukib.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/7464b2c78214e491bcc2bb3a617fa1da/lozagageruxeximegalusewop.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/wefiliwaze.pdfIn PDF document text
    • http://pileki.com/imgup/file/96583413293.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210905042818.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/bufolikuvopen.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/52754607117.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/jadop.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/8795815423.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/10811207740.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/25384781397.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0cfe44c95b5117f911a556e75109b6e7/89460056225.pdfIn PDF document text
    • https://henuopack.com/d/files/befojarivi.pdfIn PDF document text
    • https://badoza.net/userfiles/file/zaxulotefoxoki.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/zesigefibu.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/26982850857.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/50198011197.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/tonupilifusadisatibirukin.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/70031130396.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/43139577306.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210907170846797.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/44769646167.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/21706291618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=pokemon+white+2+download+gbaPDF 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_off0000c4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 10868 bytes
SHA-256: 2a8707535361ad3c88f7a181dc4c073c239eae06d792cd81a2a15a99eb817184
font_01_sfnt_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 17752 bytes
SHA-256: 3c48ead9e2f7681597c1aeacad72fb3dbb80330c21625407d77dba823f5baa87

Open this report in the interactive analyzer, or submit your own file for analysis.