Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb3e7a7a9ca13b3…

MALICIOUS

PDF

78.2 KB Created: 2021-09-23 15:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ab2780e4d7dbfc808a13e07e540b75d5 SHA-1: 2c7eeefbc2ea9c7d12ba7067724416c625a4363b SHA-256: acb3e7a7a9ca13b38864e99fca007b69b0e752c3bfd9b869133aeace30194bcf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to external sites, suggesting a phishing or malware distribution scheme. The file's structure indicates it's a link farm designed to redirect users to potentially compromised or malicious content.

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 https://pixomot.ru/uplcv?utm_term=star7+live+apk+cracked PDF link annotation
    • https://curewelldiabetes.com/userfiles/file/luvarewebobedevigedoxito.pdfIn PDF document text
    • https://iwistw.com/upload/files/29139024914.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/zikagobotolevabefa.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/felirarotagumubiwuwage.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/21d72146f1dc2c220d529ba9010147ac.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/65361121828.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161322e20e438f---2066745411.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613046cdaafd8---gemifano.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/13689356047.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/23820077521.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/94954153160.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/86308388857.pdfIn PDF document text
    • http://findacommodity.com/upload/file/relapuduzezisojunap.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021919312404652.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/62383748558.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/7b4mbn9rql4sp17p3leenq7pe7/59026400449.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/67734812407.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/42600038580.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/64499427577.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/batenaw.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/xagonifo.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/77674775225.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/31097324545.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/gorubugasemefazoduwefataf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 20008 bytes
SHA-256: 88c07072addc201d5a7f2c69123e6a5ba405e6b14a9142e3954283d03f287126
font_02_sfnt_off0001135a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 10396 bytes
SHA-256: 7cf420fa05fbb22493da4b5222ca047aa3ded8e55b43901bf597e38db535a043