Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af29d595e0fdcd5…

MALICIOUS

PDF

95.2 KB Created: 2021-09-07 17:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f3471a1e7afc20f8a010138a53b24438 SHA-1: 872930e022aea77ba986daa8dbe1736ca7dd1bf7 SHA-256: 6af29d595e0fdcd571ebee0bdb76821a5985be7db96586f1dce4ec476831058b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://panegovernance.com/ourprojects/chowki/UserFiles/file/pozelimalejivitematowa.pdf In PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16136c9ecc95e6---zogivurikasijeba.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/ruputumesukevoxadopigas.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/iketrh1n69t4l59qfeak77vve2/damiwig.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p0c8u77llb7a73jcpt08r41lf1/dekizewamawowija.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/ditimomika.pdfIn PDF document text
    • https://lemanssrl.it/file/92634571646.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609480e5960b7---6755401103.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/najezuj.pdfIn PDF document text
    • https://lordoptika.hu/files/files/mafumaropifuk.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/wigafukikikov.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/gmsnbqdgf6m16q7tfseqn1lnqp/35170054761.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/23076042293.pdfIn PDF document text
    • http://artospace.com/pics/file/19455078386.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bcef0f07ce0---94370835708.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/f0c7e177a457c9b1e329b5475dc98918/karipilizoj.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/68879901838.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/37820104666.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/8745974251.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/bosajanaguvefodijetofifu.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/xanibizasebis.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vhm1qpamoc5hkljc9tkfrfhaq5/83184356001.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/89109601040.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d2888374---44999403903.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610396a2ef335---92479872258.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/35574474229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=genetica+exercicios+resolvidos+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_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 19724 bytes
SHA-256: 52ac28cc852c296e6e54e45399fe61e55eaf2e6a4675891f7671adcef4569aa6
font_01_sfnt_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 10820 bytes
SHA-256: 6d9dde878b492bf1578b133bf7612076f702ae2af201caee262682c09692baad
font_02_sfnt_off0001569f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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