Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba30f6500703736d…

MALICIOUS

PDF

86.4 KB Created: 2021-09-03 17:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d85982e5f7274b97f887f276b7fdfe28 SHA-1: 5403f02ede5205a1d0a47b802815a61532229757 SHA-256: ba30f6500703736db181a733b09d5ff4f9f4f4253d2daff885a9b58ff1f18eb2
204 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to host malicious files. The presence of a 'password-protected archive lure' heuristic indicates the document likely instructs the user to open a password-protected file, a common tactic to bypass security scanners. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=programma+soda+pdf+gratis PDF link annotation
    • https://atcotourismtravel.com/userfiles/file/xifub.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f26a1e7e97a---51723129977.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/xepavuxunefovonovetewezaf.pdfIn PDF document text
    • https://spacio.hk/attachment/file/winavadi.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/73786984344.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d110598553e0f4cae3c009827879d972/denitivudulisovunojiji.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/17646979114.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/muzuxide.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/cc43cda9bcb02bc41fc98299045b7e03/fulexubobamona.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7952b19d85---xizudejabuvifazewiwaje.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086419ecde9d---ritusu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/monutinibadikejum.pdfIn PDF document text
    • https://digireg.org/upload/varakubinasa.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/95584982639.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/69073011478.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b95b546066---nusulujofetok.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/29529437946.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/879599813.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/pamokudezugotufebil.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076575eaec52---damujas.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/147110277.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099e46a7528b---49784931558.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/16633644181.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/93409650947.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_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E4 19056 bytes
SHA-256: ddc85100cfcb888448f8f56733e59435edfc90e7da6af7a98db19b1cb3fa4443
font_02_sfnt_off00013434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13434 10560 bytes
SHA-256: abe25e93007a11317741b82f91f2cc81c174e4d89328fd25df32e597858c90f0

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