Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d92484a90206001…

MALICIOUS

PDF

73.1 KB Created: 2021-09-13 13:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d01e029a0395d9792462a35c870c176d SHA-1: 2d3664546ecbb781531da8b541ee1cf09b1ab732 SHA-256: 3d92484a902060017d3d3a62f9b3dacf1c5a05d1ab70b00283571e07f77faa81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded JavaScript and a significant number of external links, many of which point to compromised or disposable hosting. These links likely serve as a link farm to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mientaytourist.com/uploads/files/fasadolenivawoxawofo.pdf In PDF document text
    • http://t-p-fortune.com/userfiles/file/61600038907.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161306d3c5cfd0---numudajabubepafixilotu.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/nibobusuzaf.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/napisoxukumofobuso.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dasulivikedexim.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a9af24ec---dikuvebeluzejuve.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/24338800559.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/zunidujulitakus.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/88772359727.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/roranolebipukegojin.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/67963384720.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/94411710109.pdfIn PDF document text
    • http://peter-crooks.com/userfiles/file/64980895617.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/wuzakutadumaxe.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/27214513849.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/zigegudonakikubapug.pdfIn PDF document text
    • http://builderall.info/userfiles/file/3765752964.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/8582011258.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/nitajanafol.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/7887390920.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/64588264764.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/fukulera.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/vadujalesiduvadut.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133db96daeac---ledajejitenakek.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/juzediwofugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=white+day+full+version+apkPDF 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_off0000ba01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA01 10960 bytes
SHA-256: 95eb08f4e75e3a342512b125661485a7e415fd41f5c2caad65de7f4bc5365c82
font_01_sfnt_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 16784 bytes
SHA-256: 3e942312cadee810182e48ef23cdef69ead781bdedc17da44a4f3b1f6a8e3f6b