Malicious PDF — malware analysis report

Static analysis result for SHA-256 b546064f58c43c7b…

MALICIOUS

PDF

95.0 KB Created: 2021-08-21 03:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8c23e85bc7e36e8163a154306ee6a53 SHA-1: 3b4cb2f3217b4958f1ccaf15b4979a4fadc07da2 SHA-256: b546064f58c43c7b440d176ee3155be22f51eb4343a32bf1da35f23672bdd5b5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160be3bf5a1ddd---48157865996.pdf In PDF document text
    • http://bestpokeya.com/uploads/files/tojetixogapaf.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/vetoranetatatixodudu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/88841789079.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/jebodosavodotematirop.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/lelowimabedirodixojadonu.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/11456136486.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/8aa4495d458e770620558c2c11326b90/39149622534.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/v9g2p0kf3o45rodkg199nlen3c/lodalifevogupasetalef.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/23700894461.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/jompqhp3asn6cisml37ujev09l/1416094539.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/rudolupujotikesinirazizol.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1610b7be332951---42457204678.pdfIn PDF document text
    • https://purefeeling8.com/data/file/zajabikorukiwexopuxe.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/buh87rf91dptsu2o5bd4tocc0b/repaguxubejaxabovazofufig.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/12356018839.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/waluzusimin.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/68720447941.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c4c0ddaf96133f4a7c5bdab85cd2601a/87453922065.pdfIn PDF document text
    • https://nyig.com/files/file/84877551030.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b8ebd26ea---37788088925.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608dee8625110---84864526740.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/zififuwipaxinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+much+is+luigi%27s+mansion+3+on+nintendo+switchPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB4 17772 bytes
SHA-256: c881af747274409cd7028501e7fcc226b52024235ad1253d4d827de5000a3d56
font_02_sfnt_off000149ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149AC 2340 bytes
SHA-256: cc098a881ddc22caa3cc01a08e4dc09f6720d080dcede67661e337876a86c5e9
font_03_sfnt_off000153d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D8 11100 bytes
SHA-256: bcfe541fd6cc6fde98d24a15eedb7c5447ff514d1e760b762395f6bf5b920684

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