Malicious PDF — malware analysis report

Static analysis result for SHA-256 038e2ffd44f11f19…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 12:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 78b49a3f25271c60fc21af9ea9bd1392 SHA-1: 5be128f9cf2c16a202f51d7410bbf348abc0dc0c SHA-256: 038e2ffd44f11f19c19fc97268cd047494d5ea32eb6d43f8c8a4d43425ea6b1c
176 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document exhibits characteristics of a callback phishing lure, prompting the user to contact a number in a billing or security context. While no scripts were explicitly extracted, the presence of numerous external links, many hosted on compromised or disposable domains, suggests an attempt to redirect users to malicious content or phishing pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://mytaylormadefamilyusa.com/clients/864113/File/dugedemexemoj.pdf In PDF document text
    • http://albertopizzetti.it/userfiles/files/75448686292.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/88815c17fcfff78613357a8542c6da35/buramotipagurifuko.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b341aacda16b23e72a194cb9eb9520a4/13975819.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae459e53f---fofunimusubepasesidod.pdfIn PDF document text
    • http://puppometalli.eu/file/37333558443.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608679a2de9a4---54348440491.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/2884401833.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851843c6860---lejusafidiporem.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/nejubasowesenul.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/kamuletiz.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/22091729423.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/riwozujulot.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160d7db0c5eb1d---guvubasokajabutasewe.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021747349493.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/0vjejk4fh7l65kgh7l6ld1i4pg/50017479404.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091858dbbdac---42579136867.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/paxuzokorep.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76abb0ec3---56132569234.pdfIn PDF document text
    • http://kunbot.com/upload/files/9918956408.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/7746022095.pdfIn PDF document text
    • https://tusenfotingen.nu/anvandarbilder/108/files/8829165367.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f795da28b7---87736227301.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=millionaire+success+habits+pdf+free+downloadPDF 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_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 18232 bytes
SHA-256: 62bff944441dc8ed8dce4435347f917e3f5ce7f8595a64719a603072bc7a2873
font_01_sfnt_off00010399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 11036 bytes
SHA-256: bb43361fde01e747be2d85c7d5e47b3c81b337a8be5eabe8c10cb5407e8cf3ee
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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