Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2a0d6ccfc0b4eb…

MALICIOUS

PDF

78.9 KB Created: 2021-07-09 20:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f39a94f0bd86400551c985d579fcfdc8 SHA-1: 5bce5bce6d7190a75c332826f2c2cf8abc46a2e3 SHA-256: 7c2a0d6ccfc0b4ebfce2b623c153034508f0d1f8bdc26b68c754d6b004e73dc9
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. The document body is heavily obfuscated and unreadable, but the presence of external URIs and link farms points to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5097

Heuristics 5

  • 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
  • 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://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdffda5b50---82934992320.pdf In PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/sulugekezozofo.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/povixigipiz.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d07c1fabe---31521761036.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/jafiwufo.pdfIn PDF document text
    • http://apsons.eu/files/file/77820537627.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a85752619---50834712162.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/o79g9e9gm8ch79knconbkr650f/22971106505.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/3nhjcp30l9p4lq86j9btacd76k/52166032355.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160a86bc4b4229---96224445381.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/daredepekujufulal.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d479d4c724---vusapilujexedewumazaga.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082371a8289e---dunivulivonuje.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/8b60493eca9e0dfc895e2b360c378bc5/tewajojolufemisurakuxi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160701cc7c8e55---dejarelipum.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9752049a16---55685951568.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/zenikaresa.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/b55bae35c57b71a9ac5b51c18a7fc156/54899634994.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/zatizatefadawi.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/24408442911.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/likiguwikasaxizemogixoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=network+management+card+installation+manualPDF 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_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 10968 bytes
SHA-256: c163fb3d09e9b579644596fdbd906c010294eb53efc4f50e7e20a8644ac377aa
font_01_sfnt_off00010806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10806 16168 bytes
SHA-256: 6cba6677bde0f241d5abe4bd1daabf497e221bd6197b657de4268e87bbbbfee9

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