Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb747dd4224398f5…

MALICIOUS

PDF

89.5 KB Created: 2021-09-01 22:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73d6013da6ccbc45aacdc584e4650a35 SHA-1: 18c919de83bd62b000aabaf587d07e0535031789 SHA-256: bb747dd4224398f54447bb6c4d55485c8a96eef9aa67c2fd802633d4a79c5f7d
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The numerous extracted URLs point to compromised WordPress sites and link farms, suggesting a phishing or malware distribution scheme. The file's purpose appears to be directing users to these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://banghenails.com/upload/file/tesefibesetuzof.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/f9ba3c99edc2ee8a49f9e911792cd8f3/54062548237.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31b69e9135---vixeridovototag.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/50962455524.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/k4cf3anppconger1lfm1jdael2/24672683633.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/45109535405.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160df2bbd37216---49850454201.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/fd1813da56a9b25a0f05272d492bfa47/lavixepo.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f63f1eaed---8130961448.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210829_08E64FA499ADEB26.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cef5a1b1537---wakabumavep.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092f03ce1369---pukolobozorowovowexotosu.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/62145996671.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/87715312912.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/mugik.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/8348788232.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/91196563502.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/3f2809a0f1693f87804a25e9c9455caf/togekir.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/00019c2527425a4caf028a34cb14a7f7/mexaj.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/rukoguvetozano.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/421a06e7de2c079b4549756af2a03156/39654164259.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/gidame.pdfIn PDF document text
    • https://wineart.online/userfiles/file/28304852371.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c47bd5bdf51---91625635503.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4cb4e7e676874ea8b17c4faad65e66e7/77212360215.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=change+of+state+from+gas+to+liquidPDF 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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 11076 bytes
SHA-256: 870c67b4f1ee648b06a9e5ebf3b19e39a3430b257341149fef6a4c115967659f
font_01_sfnt_off00010d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 19024 bytes
SHA-256: e226d7471fb5b826af28c34fc722c624dcca64085b32b6921040c97d41901bd2

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