Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4eaa6edc515972…

MALICIOUS

PDF

79.1 KB Created: 2021-07-19 07:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b7c4cce69df8e4ad303b5224b52f7b5 SHA-1: 80e25abc6249be45bee05e54561859e99af2452b SHA-256: 6f4eaa6edc5159724827dea343e351c839297768d05377db94625bf4528a1433
156 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 compromised websites, suggesting it functions as a lure to redirect users to potentially harmful content. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • 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
  • 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://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085cbcb2e7c9---79088192892.pdf In PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b140e098---kifojaj.pdfIn PDF document text
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/10024694075.pdfIn PDF document text
    • https://autoparkalbanese.it/file/bedubi.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/fixovivetoj.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/dalugar.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/varagasunusojikiwulifor.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5d1a75a5a---losapidadudaju.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/203472496860d334e268773.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160833b0680110---20966001766.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/r0pcvdc4b1962eucpqh6u7fhfp/34128641865.pdfIn PDF document text
    • https://tmtteks.com/files/83321773115.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zewalezilefox.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4da2e099916a85d43cf304750d253912/xonafodunuwumebu.pdfIn PDF document text
    • http://abnicum.com/files/file/99547114118.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/057b8fd0b1b366589d825c05aa00992c/jatenevisabe.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/42823815456.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160709907a08c4---1655708722.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608757fe06ba5---saveb.pdfIn PDF document text
    • http://mebco.ru/images/file/norekagakoxozolel.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/dupelimopamawivivodegubag.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/41902402964.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/v0ffr1opepeg17eo5oqop0vgt2/ravogasefabelanafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+the+iss+on+drivers+licensePDF 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_off0000d3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 10528 bytes
SHA-256: d4bfd9524cffb24fc709df44e2c6c498b0772ccf9ea6ed0aafe4ed8180d27c52
font_02_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 16636 bytes
SHA-256: 369b2f2d3741210af2a7e220d969e9d21afd52dba60b6c315fc7e7f8342447fe

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