Malicious PDF — malware analysis report

Static analysis result for SHA-256 c388b878c2c3243f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-20 16:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 029ddc3fb74e395afbb9d17d986e8723 SHA-1: d656ce237719fedcf26dff4bccc92dbe67c6a29e SHA-256: c388b878c2c3243f6b82b19b4e2a04435db6f873142d49dbbd47baf8e151ae14
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or SEO poisoning tactic. ClamAV detection as 'Pdf.Phishing.Trojan' further indicates malicious intent. The file's structure and link farm behavior are consistent with techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.2283

Heuristics 5

  • 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
  • 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://namuvaldymas.lt/userfiles/file/xepowegolexi.pdf In PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/81981667783.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/ligelaxukamofilaked.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/8f167358942b0f4d6e0ed54102e374ea/lenudegudugiwikuvofexe.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145722896ed4---90527992585.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/48452742341.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/82726224427.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/jamikumuduw.pdfIn PDF document text
    • https://subded.org/userfiles/file/tadosap.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/85190919834.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea4a76ae1b---renagilokowinorujipob.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/87896596648.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/81445209776.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcf5669538---4011800665.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/85691474952.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/15904187466.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4efc0e6aed793b37255c05e021d1af85/tosefaretegimijezimugenij.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/suvazunitabapowanaboni.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/dujapupagorifidig.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/rilutorinak.pdfIn PDF document text
    • https://petikdaun.com/contents/files/32391614871.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021091901364273499.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-19/20210919115234471431.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/fugimorefopatoxenepila.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/70217214830.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7498a745c---lupiw.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/musosapeguzirunamikila.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=quake+3+arena+apk+downloadPDF link annotation
    • 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_off0000bdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBC 10536 bytes
SHA-256: 15c58e75f4fa6a439c9c83df7d498ed4835650f0c101a4c375a7eedac894a490
font_01_sfnt_off0000d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 19312 bytes
SHA-256: 8768fc131e8c9e83f4007381cfd4ccda764b278ded6e370ac997dcc77f49cfe7