Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e759e1ec7d4f3ab…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 16:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c05a7c902d36df5d00aa05498be9315b SHA-1: e80268d73543a4997e272cb3b54e0b4e31574273 SHA-256: 9e759e1ec7d4f3ab00fed909beef00ec08cb7790ce090a8b3006985ac3b4304b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/0v92jja5q3341a7vgc92j8tc23/judesi.pdf In PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/c5a3b4a7200d42cbe756fbb2ec9f27fa/96107277825.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/cc631c7e6c226abcfdc6bddd53ad687d/gipisugamexegobujipunodo.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/pozidife.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/17191583309.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/kirug.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/24504898562.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/zimupopenabisuto.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/sqrug86e5tljsss30075cfk6ap/63955511347.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf88ebc24c8---85154341474.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f61a1e6010---66268112527.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/10adfa93904f6c716b70827e2c3fb02e/5378946801.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/jajifavosekipaxedovoruwa.pdfIn PDF document text
    • http://bndweb.nl/upload/files/13110376940.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc6a2e1c0---30730083324.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vomileja.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/23578367145.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ad27ef953d8942a1f2c72b09b93f24a0/38170759744.pdfIn PDF document text
    • http://elma1.ru/!upload/files/10548537226.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/987185751.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210629_32C5EFE2918CED33.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/88043048160.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/50649397017.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/sedofedepenigav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=splunk+tutorial+for+beginners+pdfPDF 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_off0000d17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17F 11080 bytes
SHA-256: d3fa2d5f8584c393770c36f1c5a7b355bb413c5b2de607b1ac2787e1285df6ad
font_01_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001031b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031B 17704 bytes
SHA-256: 465f6c0c873fedc07f3a78c26fa1c840e9af0eb1482171c6658a5a84ba1ac1cf

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