Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bfa0c5545f2ded…

MALICIOUS

PDF

91.5 KB Created: 2021-07-16 00:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: edd2f0a6d52e8f5680074e3eab2e6c1d SHA-1: 2d4862062c2dcc7d8c44cf1b1d7a06caf1d3946c SHA-256: a7bfa0c5545f2dedbff3c2cafc0751ce447b1e6fb32666cf3f9ed8ceed800b00
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social engineering tactic, presenting a lure to install a browser extension or update to view content. The document contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.hydro-tg.pro/upload/file/kafumadod.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/5a3ed5cfcef726d35dff7218f427efbb/16160459187.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/ginajan.pdfIn PDF document text
    • http://soles2walk.cz/data/file/42807106114.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/dogonelorubininimige.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e0de3532f2b---jobobulezamudogafiw.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3aa36e8f0332e6051cb420bc9ea5f615/9221693722.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/87322939338.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ef4bdce7b---51197217974.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3278d3c5306c0943498bb13a3991167/32991728621.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3eb5422c0---gizutomilasumaxijub.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/11486291802.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ee036532057---kavifedopel.pdfIn PDF document text
    • http://mousike.it/img_ins/files/nefefugamub.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2b17f15d3---54124061536.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/pokiwerabufe.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b29f0da1c---loduzawi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c33151401---68626859962.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/gac9bns4pkkenrts0i5383t3p2/mupivugifu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a46242a093---43984668601.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a559e3bd243---xumotodejoxitivilet.pdfIn PDF document text
    • https://cristalensi.com/public/File/92041132563.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/livefozibizaw.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/giwowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=to+be+practisedPDF 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_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 10460 bytes
SHA-256: 60886bcd40b08011e78040077b4a411c83052fbc289d4f843262f4f59f9d13af
font_01_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_03_sfnt_off00013092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13092 18472 bytes
SHA-256: 5a00cc90f35d5bdcf026eae281dc02ce8e717ece505fbb44973ff6fea69788a1

Open this report in the interactive analyzer, or submit your own file for analysis.