Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccebce3041506a08…

MALICIOUS

PDF

77.8 KB Created: 2021-09-11 02:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 38a2edb9102edbfe25eb44650395d3ef SHA-1: a37c2182d55c5378b77c80cfed9461d564bf217b SHA-256: ccebce3041506a084a116646f3d8b2bee72d08525dbb1ab8e29f224f624e802e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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=how+to+connect+mi+tv+with+phone PDF link annotation
    • https://dalycity.com/wysiwygfiles/file/84276984251.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/82737221288.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/97777817482.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/36355661696.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/66418468292.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/nutopumolitopabiwuratana.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/ruduzada.pdfIn PDF document text
    • http://congtyvima.com/images/Download/74962721686.pdfIn PDF document text
    • http://chinahongji.com/d/files/jorafutosu.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/ranitorimalegitije.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/70750505099.pdfIn PDF document text
    • http://air-con.ru/upload/files/kazetovej.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/povozirokuxokaka.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/mutezujenakuvejeva.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/l8g5jt2g4l525t539ssnkb568j/15434012729.pdfIn PDF document text
    • https://ltes2.tw-goods.com/UserFiles/files/54304619460.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/jobogaz.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210902_D523104DBB0E1623.pdfIn PDF document text
    • https://arerp.kr/data/file///zigifafinujufutasefeti.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137e6dedda28---zujukamig.pdfIn PDF document text
    • https://themalc.org/files/file/xorapejejulugagadoda.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/gusalojoxozoxejujelor.pdfIn PDF document text
    • http://vucert.vn/uploads/files/91140133984.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/803603395.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/25993655360.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea3c7be6e6---tufigakebubisezenafub.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_off0000ce38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE38 17152 bytes
SHA-256: 3978cfe247241c44ce9cfea603f7537025ccd554cbdd364f57807e438c5a1be4
font_01_sfnt_off0000fa15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 10308 bytes
SHA-256: 33731149da08997cea7f614c454477a0fae5ea0644938ee19fbe0596ff59cbd4
font_02_sfnt_off00011117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1