Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7f882fd9aa9861…

MALICIOUS

PDF

89.5 KB Created: 2021-07-28 00:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 177932b294818dbb71fa54c4293ebd19 SHA-1: f79ce77eb43e01c24f7266ed8c1957a203991fb6 SHA-256: 7b7f882fd9aa98611760b757150332542d8d685651ce4c3f9a804f5163643dd8
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan and flagged by an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://studioboscono.it/userfiles/files/19769202056.pdf In PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a479cd845---gavobes.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/83855613277.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/72280848239.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b81c7512fce---gebesabozukib.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7e9042d2---kuvonipezubufet.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b6f85e03fdd870277e709b0c9fb8b9da/65117127814.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/xaxufizod.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/411dbaede3f3c813bb1604997d5c50ed/6203444575.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-5/20210505050602837475.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/59493662931.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/42405095539.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e891cd9bbb2---redibizulopemaraj.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210505080624144.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607835a697630---lomilamujo.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/zixopapopebujunabajug.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/48j1an9qlm17obbigid673ndh7/90531649612.pdfIn PDF document text
    • http://108homed.com/userfiles/files/gifilegese.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/83d0f7b98235f1097eef107667acddd1/8121847441.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec1b3049d3---32345639404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+does+the+rising+sun+badge+representPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA65 16756 bytes
SHA-256: d5aa83da88132e3233bd47a3898f1d583b1d0cc0bd6cbf4655cbc21974fe5d94
font_01_sfnt_off00012611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E28 10856 bytes
SHA-256: 5dad72d06738377f7c4cb374ec8a1750f98aca9e1bdc32cdb6561b82bafd6a9e

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