Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b43a2494c79736…

MALICIOUS

PDF

105.8 KB Created: 2021-06-28 13:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 12301ab7a4bf870d366b54259d86f43f SHA-1: 162ea66cdadd37b752331b1404205b6c4aaa4c93 SHA-256: 43b43a2494c79736931e1899a0943c82dd6dc44bdbf6715e93a51cb4a53f302b
164 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malware distribution lure. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • 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://pistant.ru/uplcv?utm_term=storage+area+network+in+cloud+computing PDF link annotation
    • http://lifecare4all.com/upload/files/kuvemalo.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/48359bbkpsfmaffddjglv9sd3a/25516024095.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cmridmcv1a5ipiab6ra0jnud21/61169755074.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3b46922ffee0c55b4379cf936dd4e9e5/10100572661.pdfIn PDF document text
    • https://chp-travel.ir/data/file/wafitakudunuxebewo.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca621d170a---ferepijikagosutune.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/001ae1103c4e9d9272859864df34b54a/davutifomabafigolagax.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/jimirajifizamuziga.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/cddcfb850f53f12e090c4f9b9d3500b3/novilidinazajowuriwewived.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d04b7336f8---wabufe.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918c8089a0d---24092069049.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/38944963101.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505001619.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/318885746f9d194ddfdb1296f03efddc/29483737747.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9639a9b6a---34906320868.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/47cfc6c47999d8fcdc49780f77671df5/39027104051.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a591527335---54248921683.pdfIn PDF document text
    • http://dienmattroigiasi.com/uploads/files/jigomubexoterame.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b349cb17d---wolelefabuwodafob.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b85303f1418---savidedovijinodovilodor.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/67cbffc8a936f87ef52d2440d386d981/xukipisuwe.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f0dfe038bfebb0efaa04c9b35b3a74c/26508696122.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15457 11040 bytes
SHA-256: 8eb1f5236618841bfdc799bc41c513edfded553c90ab2c16b0f5ba02ce125359
font_02_sfnt_off00016de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DE3 16792 bytes
SHA-256: ca754a30f797d2a70380766d81e63927d2620845e8322d265fc326b562aa854f

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