Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6967c3ede402ee…

MALICIOUS

PDF

88.0 KB Created: 2021-08-17 02:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 63e39dfdd6353da6bbd14b9f26945e50 SHA-1: c856b9837f23c5d040b2f05101143cd4842a59d4 SHA-256: bd6967c3ede402eed4b2f99279a8d6c0eec36777c5f6bae98dc37ab203b1ae63
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file 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 trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were directly extracted, the presence of numerous embedded URLs, some pointing to compromised CMS uploads, suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 http://www.allatpatikapecs.hu/images/file/xumuxakifuborisuresumurox.pdf In PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/39908107984.pdfIn PDF document text
    • https://service-panev.com/userfiles/47952732002.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16099d0b5c1968---vifuvatodipipaf.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/29016c0662f7b2d08c9b36e43cbbf1ea/vefiluvavitunezimumofuz.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a33fe679310---44140006600.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/lozopomazufiwazoroxum.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/16589882092.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/zevone.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/vepok.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/julosino.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/5803436368.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/dadoper.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcf08d386---xepetaxosixadekim.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0f386fea8---tezasejimodip.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e29140e1afe369d137b43d5ff09f8be5/56976988727.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/vugekagixutiweg.pdfIn PDF document text
    • https://tavio.ru/files/file/40674684331.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/51307128794.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e39ed694584---68863126489.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/43046455806.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/33987566935.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/vipezegomu.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/riwanaf.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/nekufikidalosivika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=comptia+security%2B+get+certified+get+ahead+sy0-601+study+guidePDF 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_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 11536 bytes
SHA-256: 4d65ba16e12e9cc701f19f2fef61b7483e2919d6227559e9be145fd4177101ad
font_01_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 17188 bytes
SHA-256: e0e31bb3016c1783813c72a7acd454023807485cfe5eec557c64dff6a87a147d
font_02_sfnt_off000138aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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