Malicious PDF — malware analysis report

Static analysis result for SHA-256 45eccd98ffaa0aa4…

MALICIOUS

PDF

80.3 KB Created: 2021-09-03 07:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13941644751eb52642f4020cf55cfe83 SHA-1: 903c038d0974269d2a4e0c60d7164ed7dbcf426b SHA-256: 45eccd98ffaa0aa4c2d7a8c236bb1b2e14b051655d6a5d2c455dc60a79917d9c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm patterns, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns point towards a malicious document designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=delonghi+lattissima+plus+user+manual PDF link annotation
    • http://tmkb.org.tr/ckfinder/userfiles/files/vodadajijera.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/50868372886.pdfIn PDF document text
    • http://derma-dts.de/files/file/74245584337.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e5e119df6---4165026231.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/golukiwof.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca8ccdb1d4---xetupoxubinobi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b58e3439f2a---37038999329.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210623_E3E648E17FE28CCE.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160985edb59f21---puzuvunasabizelix.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/18967901190.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/88124267092.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/5795172651.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/59336778208.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/bavowonomavam.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/legukitipi.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883d6237413---43431442515.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/46148966996.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a114b4e5b65---juxaxubidajakugulibusaduj.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/79c12648f3911a43fc620bb30133d7b8/54555075938.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/20276537647.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/zevitopalejokejuton.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/jubulevobonogo.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_off0000d1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DE 18256 bytes
SHA-256: 36a2c024adbd864e75c6d4b5c8a95b8414f88dbf1911267ee6ba2a0609270b4e
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11933 10800 bytes
SHA-256: 416243d8aba552587f6df2eefb08d0b480a6ebdc45e3be8dabf7b2e3cabde5f5

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