Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1af648beb26b69e…

MALICIOUS

PDF

73.5 KB Created: 2021-07-19 20:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 324f7624bbf7fda7b478b3b65c24a629 SHA-1: cc4ec82e0eb1aa30ee9ecf6aacd1577e038ded04 SHA-256: c1af648beb26b69e6a7eea2d357e8e3711f6d855401805dcf3d8dc84ce9bf4ae
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm, directing users to multiple external URLs. Several of these URLs point to compromised WordPress upload storage, indicating a potential phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 https://kudamatsu.org/userfiles/file/tegobevixerakugujobinizod.pdf In PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/77759626768.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2505ac3d3c---25129769790.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/84c2ed53bcb73900f59bc9efb9347331/97573465678.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e165add24---xafulirebexomufivuj.pdfIn PDF document text
    • http://domainecomps.com/documents/files/58365936286.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/danobirolip.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d87d3b78c74---44305207250.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/49396784815.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7aa7e2b8b35bb9063c1eadfbce322046/74241356385.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/61341998234.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1192b6d41a---xuwuzagel.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/43567825804.pdfIn PDF document text
    • https://triosms.com/userfiles/file/22666453385.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/49117934264.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/gemetasabuwedixafusipos.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f647c6486e---74939546677.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5dcb90ad21---rolubifi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ed47d74ee5e---letokoxupevoxezerededumu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/tfsmi6lipnj9qjjc83e8k5ijrp/92283360822.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/f3db686a53b9ae2046d6e640394cb2f4/zajikip.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c6d4f0ded026724f0c7ca9458c4200f3/pamalapitogexudulone.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/94024190253.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/8e5291f6658464d8f6cd345706a58b90/63292213062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+get+ink+out+of+pursePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 10596 bytes
SHA-256: e43f1b2d7c3210d89ebea2393f3dbedf8cea6a9991f2f10ca2ca3c50fa02bf99
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1