Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d2536b6a70fb9a…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 16:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 861566d3f2eda424ba01d330434e1858 SHA-1: 19f049bd5461014f26c9473b405f214ed740fa02 SHA-256: 60d2536b6a70fb9a7a6df4f86f87dc459ffef1687f82a615b90da78a1cfbcb95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. No scripts were extracted, but the structure suggests a malicious document intended to lead users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://hcbarrett.com/user_area/file/89580139030.pdf In PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614505087dd09---rudujakuzapimirizolo.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/21160380582.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/74390661491.pdfIn PDF document text
    • http://speckrepej.com/upload/file/56717765422.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210907112215_glr3nl.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/sagiwapamonamupak.pdfIn PDF document text
    • http://unionasset.net/file_upload/spaw_upload/file/20210906024616.pdfIn PDF document text
    • https://senhewood.com/d/files/pijido.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/8428ff3c3aeb2e6e7fed623d0b4d3a78/37848930165.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/33760744341.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/gufebidaxalakizorevurub.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/62207782662.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/78024958153.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/zutelarilixalalix.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/legezina.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/23588646189.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/70483709453.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/misefipadawazavakosofigav.pdfIn PDF document text
    • https://telorgabus.com/contents/files/denarosul.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/53973235740.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/batowageguved.pdfIn PDF document text
    • http://premo.at/userfiles/file/laluwituvavigaregagitoku.pdfIn PDF document text
    • http://henca.com/files/details/file/87593225256.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5425557255.pdfIn PDF document text
    • http://hueide.com/upload/files/88780550957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=stream+video+from+pc+to+android+over+wifiPDF 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_off0000d4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EA 10792 bytes
SHA-256: d05e5c19240b6e1fb583cceb91ae10fb885887e0269fc1ba5bb0fbb89d33059f
font_01_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 17420 bytes
SHA-256: 04758be18f7a48a4252563199a82e33c4b30c3f6eab79508302a608bd0ee38b7