Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daf9227db607df7…

MALICIOUS

PDF

97.0 KB Created: 2021-07-04 23:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5ee37a7fa303598cb860b86b7c2f94a SHA-1: 7738ff80eb37e8850b2f9856f4a38f901abef01e SHA-256: 9daf9227db607df719e8fa7b5116cef830ba78f1f704b70cbde425bcf7f48ccd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised websites, suggesting an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of further malware or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://brooklynsmokeshops.com/admin/images/file/59478608500.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/483951a38b70e36aaaab3b6d333910dd/49865206776.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/32336079824.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/50594293255.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ff8c7fdc044c8adef242d5f7cbe0a7d7/novezoxokuvegubakilamu.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///navifufawesazofutidazu.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/fiwosuwefuzajilejigezuwi.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3735cff21---wadudibozadatusuvajeze.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/13253169977.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/90148756460.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce1333ef11---xutekojaxi.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/36885685776.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812c25c949e---79875369121.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/nikadowegigunoxin.pdfIn PDF document text
    • http://alptw.com/images/files/vasukivurirawizezotubi.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/s0g5vhbu4ukni16om0r8i8far6/pobixudizixosefebexiw.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/fufakupewevubazif.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06cfdd886---10835179790.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16091e544f23a8---zerijefofosifuludotezo.pdfIn PDF document text
    • https://signika.pl/Upload/file/6933078773.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/mevelumiwakufo.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaa7827d75---pexadelu.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cfb53541d---zejegororimuzutofebin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=grocery+store+business+plan+pdfPDF 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_off00011414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 11004 bytes
SHA-256: 21b8a5ecb851b11d876e3573a9a8d02ac6b50acd67cee4e3324eb1f2bdbc5ac2
font_02_sfnt_off000145ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AC 18028 bytes
SHA-256: 013e4b80d8712d0b015b959f5399c0733b2b8ef7f6623c6c5df00f367300365c

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