Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ad01c07f84a163…

MALICIOUS

PDF

80.6 KB Created: 2021-09-03 09:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e517c9ed45cd4034d23dad6c7c2d161a SHA-1: b320a2ced6af8a3adc6a252e19ad21b02c385526 SHA-256: 85ad01c07f84a163376ea25d787c97011a7a9911023e664f019c981ae60071cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs that point to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://laborke.ru/uplcv?utm_term=bonding+types+and+electronegativity+worksheet+answers PDF link annotation
    • http://ylplj.com/ckfinder/userfiles/files/munagum.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/narusaw.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078439f47770---27206480691.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5341ed6ff---pexemo.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/38822391967.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/19669188939.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a734bf05404---jeduj.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1d1pc0eo2o7jrleili669h3s81/25697666301.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/40546126043.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/96293701745.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/3ed653591f27c1d1378a187d4d47f060/titexudipaz.pdfIn PDF document text
    • http://cl-pub.com/files/files/kozabirifevapawuniwabo.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/95516301958.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/tukonoj.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/boxoxedela.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/f568580d509d28b7af3c02c19677ab3c/5407307923.pdfIn PDF document text
    • https://taybaite.com/userfiles/file/lupaxasexijarem.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/12117425111.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/52633462547.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/vutoxopefekatufede.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/8776230498.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/ledejekifo.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/penunuguluxilujefimewusi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161103449aeb5e---jozijimunigiwidi.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/vavozexeviwugizug.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_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 11204 bytes
SHA-256: 42ba3cdd053937d166a20b0a8543bfaf5ea04e9813a050a8d53d70c405b252ea
font_01_sfnt_off0000ed28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED28 18068 bytes
SHA-256: 8ed6687dfadf374eff2656959d0ceab92f1d77a44433be861f1a9ec8099db849
font_02_sfnt_off00011c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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