Malicious PDF — malware analysis report

Static analysis result for SHA-256 62888251f4f1afac…

MALICIOUS

PDF

88.2 KB Created: 2021-07-05 20:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4a135916e5b9b5947752831a3609ecf8 SHA-1: 0639a5d779f666a3169d61afa60c43c6a59c889b SHA-256: 62888251f4f1afac02c792d4eedf1a86db5700b63e0de8c042602df2ebb8b9c0
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the heuristic findings of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM confirm the nature of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/83dff4ba8937043b8cb633dd23c3c709/lawuvejobifo.pdf In PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/86n0ros43vkqf64fljbqmg24gg/waxixunejoriza.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96e86184c8c6aeb96b9ded227fdbe898/45764614391.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/60262424715.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/109155863.pdfIn PDF document text
    • https://parc-hotel.info/file/43832425446.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/50589363765.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6b3f2712b35ff54a38984d87fdd09224/21561105745.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e9e3c78d7---nafilojokapuzuvolakukepu.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/38c1ec234ddbd405fee33994fc2de36b/xidizunagadonixifizikik.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d356e19e7b---kazaxuzakiniko.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/21496275839.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a50d9cd8---85316603723.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/taligigazidovigedexif.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/14786b86394bb353dd91805b129d5b8f/72079126534.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/jorisetigedagegel.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/89242381142.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/buziraxolizivape.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/amst98e12dmdp6qknet2ja2ce2/lepugegibafo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc8abb259---xefunamoworu.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/f8e7577f2fc687ebd654e6e5b4b9827b/10049996464.pdfIn PDF document text
    • https://hoalavender.net/upload/files/xebixenovepadipebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=1000+most+frequently+used+words+in+spanishPDF 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_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 11288 bytes
SHA-256: 3c6037809f39dd831f0cb2b3dfac00b9029f23c6f46147ced2e6fa252a33da74
font_01_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 17084 bytes
SHA-256: 78ddc3b4fcf6a20c0d2fef4c7a731fcab11451ece31166db79a2251da30b90fe
font_02_sfnt_off000139e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.