Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f459d287ae3e4e…

MALICIOUS

PDF

83.6 KB Created: 2021-08-04 02:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d79d944e6fa77237ebce2b8236a93eda SHA-1: 124e38a15f01d722861bf5c2c8e61454de2d694e SHA-256: 70f459d287ae3e4ec82ab2a4e43e82ba76e0ca6ae51fdacf2ddcdcec86ad536e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to call a phone number, a common tactic in phishing and tech-support scams. The presence of numerous embedded URLs pointing to compromised WordPress sites suggests a link farm designed to host or redirect to malicious content, potentially including further stages of an attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • 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://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0ab91a631---bovofugigizinap.pdf In PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893f864a74f---2688566069.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/6631a5c6ac01c017ee47405f0184470d/mepidupipot.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160916db554cc7---95529756805.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210619_AD01FE25CB1E05B8.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/33402184362.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/9d5cc8db62f0a7dc6ad4a889ebb00ee7/32802297475.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/vifomagexixorajarigawenez.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/37498255440.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc0614e8ce7faf8abff28692bf60ac9a/5287893351.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/59856064848.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094210a2589d---11796706569.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f06a7fa19---zedigegam.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/noladaxifefosarexaxum.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/2543552401.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac9d226bd---20340145562.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/39074903784.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d1db7677fe9---57293407630.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xowofaparimewe.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/fce8945b44279db3cfca7f39ba23371b/varej.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/77e0f009c43ed4fa6a0ab67a797b5640/zidovovo.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/29498878450.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9eaa9d44c---5757449019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=funny+phone+numbers+to+prank+call+australiaPDF 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_off0000e22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 16984 bytes
SHA-256: 6ac926d1431ae36854d34a975947e1bb8bf8cdce5e823ffaf4ca469fb4edbef3
font_02_sfnt_off0001268d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268D 11064 bytes
SHA-256: 4a92400c0b0a9383ae7257352688e6e8004a988d358816e7130149552fcf2891

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