Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cec32bec709bea…

MALICIOUS

PDF

75.0 KB Created: 2021-09-01 13:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2f7d70fc0ee9205d015418b9e5b6eefb SHA-1: 87c3df5c7edef626f21330d0e763d35c339f91ad SHA-256: 69cec32bec709beacdf4f809bb5fdbd80295cb394820646c69b8b6864aee3a89
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution scheme. The presence of multiple compromised CMS upload links and link farms further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nktrading.qa/file/files/29578864761.pdf In PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/kizan.pdfPDF link annotation
    • https://areicon.com/images/file/karijilusiretewitoneno.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607014b708f11---puvigido.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c47e8cbd109---62264152914.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/9b4c537583bd3e4b49190f1f0b9ebf1c/kifogurozudajezigupab.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/5910336438.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/zibero.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/543763bafe82457164aafc854a496d13/bobovakoxewaj.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/lases.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610974603a2d0---99897493838.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/6937217429.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/cqebcplggvj9j4km4g27eji8bh/jafepapibijirozufi.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/70c92cdd0eed5f9b83ead6d932631e3a/somiwulaxexilawutenibir.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/63401220197.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/37860524476.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210605222126.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/67167588156.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/lewuwonaxotawebev.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/jifejumusebapiwin.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/pibiwit.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/727d751bddd1be4b714f6150c33b1be1/30657836985.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/8a1d048e107c868ad1780b310ff5b897/sanuliseguwepo.pdfIn PDF document text
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/59247926283.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/g5i24oadl29bce0srhe8q2ng3q/18545383436.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=find+the+curl+and+the+divergence+of+the+vector+fieldPDF 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_off0000c1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C7 16440 bytes
SHA-256: 059b4ffad57f1ea37098feab7a845df1712bb03ee2156fe9ecd9cfa98e3a776f
font_01_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 10732 bytes
SHA-256: 6325b4fc439fce5a97e0351bb3d2c3d472cbad7e3ab730560271acd8780199c1