Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fb8b480a29b702…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 22:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2d4daa9335b5ea47f372c3e0304302a6 SHA-1: 7af0fe9eb66fe321a42e75e682b5e8926ee7f143 SHA-256: 10fb8b480a29b702e9196d6a7836692352dedc1ff84f28d341e4b232edae5b76
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, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The presence of multiple links on disposable or compromised hosting reinforces the phishing and malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851ac2a4ff0---73371102434.pdf In PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/bonogeviv.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/94099769348.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/24310396854.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/wemenusomadamixusebevox.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/kusor.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b115952e458---13681088439.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/999ot4pp8dmsr6g1766jmrfkfi/77358199145.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f31a43e85---36576909962.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/jitimewul.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c222464841b---tojib.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79a54a932---4162564149.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2e2ba8a44b2e1a8fe776b0372c4fff6b/62508363056.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/56331409514.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3fb8ee401---juvewobo.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/dh9c5atdo2dbvl4399mafjurfq/delobidaxebisumudaser.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/10p8mp7g6m3ludi9vne7usm99l/zivetobalof.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/049617a0926de925442d624b419548c2/21219810273.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/kegez.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608084b78dfd6---10417431474.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/88160762299.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/45138115736.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/leteriw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=google+what+two+colors+make+redPDF 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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 16952 bytes
SHA-256: 9d1351b8e60080adcbfd73c23f486b556ef517ebb8b8503c0dd14ed25980cb27
font_01_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 10836 bytes
SHA-256: eec6ea434b24db000d412f9544b02bc1260b34ee98e1256e0fb557361ebc5bdd
font_02_sfnt_off00013150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13150 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.