Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be9698cf41bf04c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-29 00:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9baed2d8acab8759c5ce46418b4a1676 SHA-1: 97fa29caf2e843f80ce80b83786e43ac9dc03523 SHA-256: 1be9698cf41bf04c3b33b2251ff1e2cad3f12bcd4f515f5c4345311519305f09
176 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various domains, some of which are identified as compromised CMS uploads. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, aiming to trick users into interacting with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://studiorumeo.it/userfiles/files/34499081411.pdf In PDF document text
    • http://pwmtqatar.net/userfiles/file/kokiberufeb.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/31640614469.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/29936239186.pdfIn PDF document text
    • https://arendic.cl/files/37068971706.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/766148538.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/98177734839.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/35052092763.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/lajakuto.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/fedusuw.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0a17b25c07feea035fa3731af1a5d132/36612257652.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/32409035544.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/zanefotugofizikufifi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138f98656a4b---seruzexobijenobez.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb310be520---3493067423.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/51131051712.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/zunikuzexogobo.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/22/27152101730.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/70691781359.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615191fb1333b---wilapaxalovif.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613970b948484---rajedo.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/ridoduwa.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/dibunikatonodamup.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/10779147615.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161505e69109f6---kiperevudura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+earn+free+cp+in+cod+mobilePDF 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_off0000b4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EC 15308 bytes
SHA-256: ad7fc0b4fff7aa6c5b60e236eabe1bd8f08564d68a7af057162c009bd51cc099
font_01_sfnt_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 10832 bytes
SHA-256: f5e096b2131228dff2dd2171ded7247bebf3cbe6c2f4b5a5355bab02a5766ac8

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