Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a60704951a1a97…

MALICIOUS

PDF

72.0 KB Created: 2021-09-29 02:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b59035cb69be146a96afab791ae4365e SHA-1: 8b094251be79719b4dd6ce07485afbe8303e0abe SHA-256: 69a60704951a1a9744893a0623a3bc72fe5c373d43ebf23a67e5e8cdef3955f0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings clearly indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/19c970ec443aa5d716084ad86a83edd3/latolilokimupafaneposanof.pdf In PDF document text
    • https://mirrorlink.com/public/files/files/51257887572.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/99762204939.pdfIn PDF document text
    • http://irinabailey.com/upload/files/98106402762.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc47570034---56431423250.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109281642039484.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/durijorowutalawupakap.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/89172069418.pdfIn PDF document text
    • https://uangraja.com/contents/files/18339993435.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/nawamukixolafa.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/6471868717.pdfIn PDF document text
    • http://4bx.pl/public/file/lamimedolobatepeba.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/30417745559.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021919514437470.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a4931ff68---bopoladabevusaf.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/58225642536.pdfIn PDF document text
    • http://machulski.com/public/file/sesirotizajuseboxino.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/zuretapijisufejonude.pdfIn PDF document text
    • https://tepihtrava.rs/files/bowime.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/52550170366.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/2612568570.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/vurelev.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16149489772458---bones.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/17893248776.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/vodotiluvazotuxezesavem.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ad220108dae67dce9c5c7ecf88c7a9bf/52833356430.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/16314756230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+android+broswerPDF 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_off0000b743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB743 10476 bytes
SHA-256: 26723f3509eae823310d2e243c62a6d9fc80ebca1549a3fc7689fcb80ee03b36
font_01_sfnt_off0000cf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF46 16812 bytes
SHA-256: ba73fd935ae445ae091149a401950c75b28f6d5431697d97ef736c1ef1d7ee14
font_02_sfnt_off0000f9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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