Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f51b7fb25d28d7…

MALICIOUS

PDF

108.4 KB Created: 2021-09-06 21:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 31fa0345bd44c52debb7ef2384999c7d SHA-1: f72a241c5159a3796434bf2bb37bee5bc87293fe SHA-256: 46f51b7fb25d28d7eda9e9f40674d0d8695cfc432ffb34b04563b65633f15b4e
176 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, indicating it's likely a phishing or malware delivery mechanism. It contains numerous links to external resources, many of which point to compromised WordPress sites or IP addresses, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure align with spearphishing tactics to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.delaneyllc.com/ckfinder/userfiles/files/pikubumipazajow.pdf In PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613568c3790eb---88511145082.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c338d901cd0---xeloriwizojazekejolupiba.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0407a98daf---66727066367.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/tudiwib.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855fa52994c---51983990737.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202108191502562378.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/sijekubobano.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/37064348661.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/14916258584.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607328ca56a5d---dekomidabizokiruke.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160743256c3220---xazorezofumekupavunaxoje.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/josufefer.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/rowukujixofijolawarumos.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1417e94025---mazawo.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/4e45945c64f0e648fa98a392e30a867b/zusixidom.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072a577eaac6---lunobelibugivulomigo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a7b5d1e2e---risejotobejosejugepegan.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/1jq5t23i7g9je6190p0fhtfq5r/gafunazil.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c4bb7f6a---67038335376.pdfPDF link annotation
    • http://www.polni.si/Images/files/32154949987.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/navatotan.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d58e58fd50---doregovenegafemawadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=breville+juice+fountain+crush+manualPDF 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_off000142f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B0A 10948 bytes
SHA-256: 3a5fd34c5bea51e1ec287b3389f5a9804d3756170ba4ec54bab996b544895355
font_02_sfnt_off0001743b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1743B 18396 bytes
SHA-256: 3566edd9e510b147b074870cc1b7f8f7141a914e60d8f3047d91408a0790caf1

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