Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89bb09f72d6c77b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-07 09:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 285c7aa0683793999f02a79d7c0a8dce SHA-1: 5a24bdb2e232f2be33f1c32c532aec335bc14fa2 SHA-256: f89bb09f72d6c77b3476f94d06d762a5a2f9a88623a9479b8243c4183e5482df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the PDF format suggest potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://wastran.ru/uplcv?utm_term=accentuated+meaning+in+bengali PDF link annotation
    • http://mbcasc.net/imgs/file/gaxugowavuredeseno.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0ka648vklv1ma170nhlhhrtp7/ninogowa.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaea1b81f18---zewumobu.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/folekijamixevebuze.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/4e8946026300044de2d3b0c98bae4870/92934108035.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/k7hcgjlnc9ger3o7q3fe91fhol/bokefotifuzugukutodidise.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f7e4439bb---83185651243.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093aceaaac71---26590079886.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/7jj86pbt9htcmb65njclqjfu8t/xeregudumubijufowujibiniv.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/betubixavebitodi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e90fd91ce---xaremus.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/unt4lfad7u6nb15fsgo8k8i5qt/kojisezaliwusote.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb78086de---nemelinexogolotedumozubi.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/6050976340.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/1ej0fpkrnpb3fr8q80ba4mqcdp/29535536398.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e2f172aa7282e20095249c235406297d/59727225137.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160857bad7776a---musugigelomaxuxepotedeze.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/59982648929.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/130868a4b1543b3788803139930e1351/bijamepaverobubagoj.pdfIn PDF document text
    • http://www.siposferenc.hu/html/21608907632.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/dozamujo.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/gosematite.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000e027.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE027 20532 bytes
SHA-256: 11994905d3bf1bfffc687673107a9eaae4590c4d8307e7f5187fc39b425fe095
font_00_sfnt_off0000c816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC816 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 10544 bytes
SHA-256: 1b8e3291dab3b2735838a1a008e1990e06e8446ae47f383cb0de3b3105a962ab
font_03_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 20148 bytes
SHA-256: c52ad64957966128857e6717590d4ab2d67dda5693c65b4ee2cf20093d4becfa

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