Malicious PDF — malware analysis report

Static analysis result for SHA-256 590ccc1f1d8ebafd…

MALICIOUS

PDF

95.2 KB Created: 2021-08-14 12:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 28eac9af4bd9427880805035269f0a76 SHA-1: 004d62210d42fa59f30bcaaca173bd401aeba5d9 SHA-256: 590ccc1f1d8ebafdbbef4e967bda7a05d34f1a5f836501e00c72d6abb9369e99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://autoandtruckrepair.net/nbloom/fckuploads/file/37175481763.pdf In PDF document text
    • http://fly.no1-yes.com/userfiles/file/lutux.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/panodatudi.pdfIn PDF document text
    • https://svltv.in/userfiles/files/vugidetuwazivagut.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091aafaf301b---nanalibelotefowa.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/35928366628.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/54135158402.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/ff597b5aa3d82d27c80c3b1517c3f349/vusonepafoku.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/97907796518.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/vm5q87543tua5ig4jkf53a0rhe/nazifi.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/litokuvituxibe.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/46310615799.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a914979bb11---26319447240.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/meroxelo.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/wumekepawa.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/sekoramopuzifobe.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/xesotosobemepidufizowo.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///ziwokoxuxaxutolabakexogo.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/45731225908.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/66798100555.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/rexezel.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/83595782502.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/gebowovaxajetikufewoz.pdfIn PDF document text
    • http://sciattella.net/images/file/negilab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=carbon%27s+golden+malted+pancake+and+waffle+mix+recipePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 16280 bytes
SHA-256: be851b298df7c3c9d2daf20623ae38acb6a52fc53d8fe81893fa0ee80d61d9f2
font_02_sfnt_off000121a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A7 19032 bytes
SHA-256: 713ac8b6f0ed6bb23e0e6af2d1af44e8b938e66361530df23d83d14020224ff1
font_03_sfnt_off0001531b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1531B 11448 bytes
SHA-256: 3c8c4b08eccb8ce5cde351a287f59b9cddb0a8ae0fce31f8a92da8b7fc127d63

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