Malicious PDF — malware analysis report

Static analysis result for SHA-256 7368c5bcd6717cdf…

MALICIOUS

PDF

102.8 KB Created: 2021-09-05 02:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d6a13a88452816c363f4a623d74eb817 SHA-1: 21be7e48e8ab6b310795dde4c6d769e52f7b7122 SHA-256: 7368c5bcd6717cdf54a93198f78c1830af670d97452de5d7e47076a18cb03876
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15061cdaf---dilibafil.pdf In PDF document text
    • http://www.77ice.com/upload/files/47033905597.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/xelemovoxaxobogutokado.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bf33ad87---tipilixutegositewakajer.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65548c8310---18121954657.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/rozosesagibamuxokug.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/58698742563.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/54587072842.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160742a0f158a7---dubudibexu.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/58619567300.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/34234660734.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/45040027100.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/21333711909.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/36479093524.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/92392126676.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/86590194949.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/76616635355.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/33cc6bf5283418f8c6d8d33bc44a855a/vivuveritufiturojoderuse.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/1376841193.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/8k60025hmk1ahvjh3cmk448nr7/10887858805.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/kaguxovumutimusibebuzeg.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/42721434087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=omron+m7+intelli+it+manual+svenskaPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 26216 bytes
SHA-256: 25a1da16e3f2b019757aa421f6a870caf5ccfb5c2c60e61b3afc6ed21b875eae
font_01_sfnt_off00013a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A67 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105
font_02_sfnt_off00014330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B41 16964 bytes
SHA-256: 333f1045614e29e560446f637a18828ee762273df3df991f227df131c67009de
font_04_sfnt_off00017418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17418 10600 bytes
SHA-256: 303650bb67ee933600b9b5f2105441fbcc4b7a303c9e2e4baa4715b176041ae5

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