Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b48864d465e20d2…

MALICIOUS

PDF

85.2 KB Created: 2021-08-06 06:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ce6f8290c47234c87079f010e249f94a SHA-1: 48d13943181a4cc16fe9ba97c2fe85ca4b20abef SHA-256: 9b48864d465e20d2755660539fb349d7de2b47346a3a4f05b6a050ef96d50c94
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised CMS upload storage and disposable hosting, indicating an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://veterani-pushkino.ru/userfiles/files/21324405693.pdf In PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/272mmujhhhpfc9e144kcndko0b/1798661675.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/3593ce8e8bc5b3fa407a6c80de18faf8/53875124913.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/a92fjdu3j8470aeuu8esl8cr34/62631334951.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c91b5324d6---wububetujimimelavi.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0ccb59a05---fazasaremupibiz.pdfIn PDF document text
    • http://954move.com/clients/4890/File/56987342679.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6bb9e7804c90f3cbfcedf6309fbf68c0/jodizalanizibutuvan.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/43baed20cb9e86fb6f64fbb87643849b/93187462116.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a40d05738b6e44647f5fe23ca87843ec/gedokejokusavitaxamaban.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/7dc6857d478d8685c2bb153d74030eee/28847538837.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/46639948722.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/45577467222.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/55321460777.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/kuguberemeloki.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/niterid.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc3cd469bd---69908835599.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/7283244160ff48e32d88984e4b7ffbb2/6644959415.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/37041540397.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/foperuve.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/97945254232.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062606102571.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a806971a252---sigibozixexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hoja+de+dos+rayas+para+escribirPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 17072 bytes
SHA-256: 963ae63b886df34ea1efe3450a53c2097b5dc966f76dac9e46b64d10db42e065
font_01_sfnt_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 10632 bytes
SHA-256: 8afb1fd3096671809483b360c66a12e3205ee695daaf3033c0326ceb4951dab9
font_02_sfnt_off00012cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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