Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7459a6cf9f30422…

MALICIOUS

PDF

81.2 KB Created: 2021-09-09 10:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 206f62c00ab95b6b937e6822c3e0234f SHA-1: fcb6750520a40d084b02f7c2c1d8f842ab14d976 SHA-256: e7459a6cf9f304224f83d80587ff7215c9979a08822791e1897a0f70f3e291ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a high concentration on disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crewmak.ru/uplcv?utm_term=ninja+moba+hack+apk PDF link annotation
    • http://bawaconstructions.com/editorData/file/ludabogerakadutuvopiropu.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/fezunan.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/zopelalitogewisidejosup.pdfIn PDF document text
    • http://lagrupacio.cat/file/96892952916.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/55240578885.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/xisafesaruvofitew.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210904125908582.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/20984035920.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/2511637717.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/97676856348.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/mudotarugipopobabugakazi.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/16346296586.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/881779208.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/fuzowuturibiwowepe.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/82539689570.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/46357831421.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/zegaw.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/tulupinafeposipade.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/95039539615.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/kapepikutozebexuzi.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/xefatimutijezu.pdfIn PDF document text
    • https://digireg.ch/upload/nokibopozirevasopew.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/fidizeloxezuxubiwotu.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wasukikavodomegogotu.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/rulovodakinuganitaki.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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 10436 bytes
SHA-256: 42bf10456ce3bced82d010d35e2f515ec4ea190d6b12bf3b01b3811a8c59a517
font_02_sfnt_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 18532 bytes
SHA-256: 7204343d8ab9af202b5486e355976532451b001332eb2e70d5e30e32a77167de

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