Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14f61a740bcc129…

MALICIOUS

PDF

70.3 KB Created: 2021-09-24 15:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fccd5c7e34356c3d5f6d6a1a6a23d292 SHA-1: f3e47cf90d7ac8e5ba13085ea59a9dac335d667e SHA-256: d14f61a740bcc1298eace7dd459b4e94622e10ab0893a5c06c80a52528f31aa8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content.

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 http://rheinmotel.com/userfiles/file/xuvipuxifefejijefadoxefo.pdf In PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/vekaligemubu.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/zixumu.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/kuvivewixenajusibudeli.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b718ee586---musiravamogumomogu.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/lokutalabivek.pdfIn PDF document text
    • https://senfina.top/uploads/files/77280053965.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/41044304222.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/kepolafu.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/32175578575.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136fe141ec6b---dosopurovarelipapunubutag.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/37134258874.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/gaxosuruwerakor.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/85952140776.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/futajenugevasuperefe.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/76933931325.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/82675385546.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/nisiz.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/1000950239.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/tumab.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/zojigojugeresomi.pdfIn PDF document text
    • https://karjerastests.bankai.lv/ckfinder/userfiles/files/77438845823.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/savokagunurorusenu.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/kosederobel.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/dafoxaresafotulugalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=apps+from+android+marketPDF 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_off0000b46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46A 10688 bytes
SHA-256: 0052bb58db2b5b61979175e59e451aee001bd2da686de7c356148f5a0da667cb
font_01_sfnt_off0000ccf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF5 15464 bytes
SHA-256: 6f15b13e5211a7bae3dc28c6691aabe347ae3ee0438a2f9db87823442e2cd672
font_02_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1