Malicious PDF — malware analysis report

Static analysis result for SHA-256 569b7a6a30ac968a…

MALICIOUS

PDF

78.8 KB Created: 2021-09-06 03:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aa88d2b97b7f0ce285e0268c546ee700 SHA-1: 7bc8e5f70f3cf79e5813e0b04b732a99643b817f SHA-256: 569b7a6a30ac968aad66838ab4c5f06be343ea81a0a890f0208f51f3c12d3c8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external domains, many hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 https://garglob.ru/uplcv?utm_term=scan+app+ios+pdf PDF link annotation
    • http://limeitec.com/upfiles/editor/files/92988505437.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820ddf10940---pesaliwafosotovitufomim.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/defegojolav.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/93076811658.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747882a4908---tovufefiwijilozupu.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021070120501773499.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c68b58563---40056366376.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/jorewuxoveri.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/likugagofab.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1270fb8e3c---nevejepazaf.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/9529423679.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0d134ed51d3227920f7c675dc56e3192/sisalazanew.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a759d40f0---rezalemorexa.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/tifedutokerutanejowag.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7d116dad718e05df89d66b001563ae69/tixupafivifiwusolaz.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/51298074921.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/73897223741.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/eqns1g0fv0nefpr75j32s19vq4/93928997514.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/47098487547.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/42917041737.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/98967594492.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad54426593c---14921699055.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/45907480601.pdfIn PDF document text
    • 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_off0000c258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC258 10312 bytes
SHA-256: 4caf22686037d825cc0a90ed03ddc17c912390d676303ada97a6214b91131c1d
font_01_sfnt_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 24088 bytes
SHA-256: bb86549ee628f945fc3b8c2413c7fa7e324d523d5a6c6d8a95d7753430740ef0

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