Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc2d143e7b016d7…

MALICIOUS

PDF

90.5 KB Created: 2021-09-15 17:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c0ca8a5be4d3c6e2ceaac2685facb1d6 SHA-1: 50421ed1aacc78586f2fbc651f7f91ae7a92a6b2 SHA-256: 2cc2d143e7b016d7e269bbee997da9f81f80f07cb48583b4a5a9c208c9caf292
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on disposable domains, a common tactic for phishing and malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure suggests a phishing attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.pro9apps.com/app/webroot/files/uploadimagesfile/43465477327.pdf In PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/pulotadasut.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/ee6b27bec548d6d8d4422de75ebb4147/wijunolosuxi.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/77985864559.pdfIn PDF document text
    • http://szwygs.com/upload/fukozekadosetisafirano.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/rht3rguvan0s84j24n11idicc5/famiwuduwo.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/dopituxesa.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/34127367370.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/34156959954.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/watemulak.pdfIn PDF document text
    • https://webrobogo.hu/kepek/35626162705.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/55192199549.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/23456621990.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/83062745764.pdfIn PDF document text
    • https://tcremich.lu/files/files/sesegajiruj.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/7d88ed447794f8db94cf7dc0129acebc/fibevabomasibun.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/f5a8f3a7f9faae758398ab4f2a97e072/kuwede.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/xesebolalex.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/91356701719.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/zepurekuxawe.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/25304646872.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/3152758297.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc57f0640a---69497055442.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/novofexewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+unlock+iphone+xr+screenPDF 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_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 10680 bytes
SHA-256: c25858ca842b61f96e87a86c4ef7bc7e69e54a6f4f85e28dde13ab096e21b090
font_02_sfnt_off00012e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E10 18060 bytes
SHA-256: c60e7fc6c6ad369e9fe4ad20a10c2e1fb59c8ff3a82594eaf2de1ecf793a4ead

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