Malicious PDF — malware analysis report

Static analysis result for SHA-256 146ec218112462ba…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 13:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e6d4534d78de0643d1955fbc0f2ea727 SHA-1: a33888fc148e38ec3a8b67d8a016dac54358fc3f SHA-256: 146ec218112462ba77196a4d77b376d21ba6a79f57e05f2dac31f3b6d6851dc3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and it contains numerous links to PDFs hosted on compromised websites. The presence of 'utm_term=mbti+test+download+pdf' in one URL suggests a lure to trick users into downloading the malicious file. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://yasacompany.com/upload/files/20614866821.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6369af4fa4c18f0102b8563b27e67aae/linod.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/jururipaxoge.pdfIn PDF document text
    • https://bio86.net/fichiers/21455266855.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fd519f099---jetorerapajinexadagetat.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721f3595c53---jefixoluligowag.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e6aa42763---40518733810.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/19505479590.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed26140663---57492882981.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/90167873500.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/minugemerixotimusi.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/xunilawuxetelaj.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/pogekumewodusomajalato.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118a478d1488---gifijazikodisazuvetu.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/63947443900.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a45cee99---bizedizokin.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5ebaef2f---vowijefonuze.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/74722427753.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/viboboxazazopufup.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/vopijudimibosuwupinizigot.pdfIn PDF document text
    • http://rfamilylucas.com/clients/73238/File/fonasikoxabasemem.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/taviv.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a013973ebd0---xigixezimogoxez.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/773f68db794f79ac0a7fa7eace60876b/87145041220.pdfIn PDF document text
    • http://cloverdiamond.com/file/jarusurujizimebiravif.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de63da9e016---fapovetinuziridugake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mbti+test+download+pdfPDF 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_off0000dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80E 18236 bytes
SHA-256: 1b0d98ccd5cf1949a8e7c3fda842aa729107aaf2dd007ba69aea3e5a9d4cae39
font_02_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 10612 bytes
SHA-256: e8bcbc450df450a062b366a3612a12176b59de4886f4ab28d6480afaea1ea037