Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb84619bd843e239…

MALICIOUS

PDF

74.1 KB Created: 2021-09-15 09:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e04e6ae2e019cff2ba46306a1d7162aa SHA-1: f37c8554b5720669e62c2e1e0da4dd0ac317d575 SHA-256: fb84619bd843e239cbf696f16aceff8f314a30192071e2fc5e37a8e53d1fe622
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of callback lures and urgency language further supports a phishing or scam context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ph-easycome.com/userfiles/file/gosetenatodizazeruleri.pdf In PDF document text
    • http://mamtaniketan.com/userfiles/file/maradezemoxugovoxosaziko.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/mikevoretexemifutasek.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/70516653101.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/r3v4lnd0ipbeipikmfsmpofumd/98469214709.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210914051111.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/kudetadirijeziseluzop.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/zojesuxabokina.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141394b11dac---wobalulepowinew.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/devoj.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/suwozarubakujikibojote.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/xulusogora.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/23709612579.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16131833658c34---puxonatipowelumanabek.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/sevulewizamifowevebaput.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/21315358184.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c23a17cb1a56df3f1904a8cb86904f3d/kufov.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/nujukupevasaluxusagi.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/dunebejaxa.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/xedew.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109131742264741.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/sideriras.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+keys+to+success+jim+rohn+pdfPDF link annotation
    • https://easyown.ddproperty.com/datas/files/42161258843.pdfIn PDF document text
    • 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_off0000bb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB35 17908 bytes
SHA-256: 53e7f2678ac1623d0d8ac27597094f29c328131fc8354a5cbc6553de2d07ee38
font_01_sfnt_off0000e976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 11076 bytes
SHA-256: b978340f25417f9a36597120f2241a41f804a19807d46538b696a730dcc5f8db

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