Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f10e856cbd203a…

MALICIOUS

PDF

88.8 KB Created: 2021-08-16 03:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 86e45cb88971ac1eeac59ff0b2287002 SHA-1: df64305dc72cc120c3ab5d21bdfc2bc1cabe568a SHA-256: 34f10e856cbd203a1d2e5ccfb4ffe149a7dd97b6979552363642b84debb56ab6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, suggesting an attempt to distribute malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b456e41f8---93240861788.pdf In PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e3785ec803d15d050ad2e792393e0318/29836016518.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/kejiwapofaxutize.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160878acd96067---fopenepozamasub.pdfIn PDF document text
    • https://www.retake.dk/ckfinder/userfiles/files/21545997179.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/zirevujivopapatebogowe.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608808133f380---nufefejatetunasadifi.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/nazod.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/manunelizawakuj.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/34622849980.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a05fcb6faa---vibolunenizoramigas.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210812_ADBE78562B490C61.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5165bf3bf1c527f3e515ab6f29588143/gibobemi.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/48621302272.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075e731edfe9---38068003676.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9301a4de3---rojirorufiwexifode.pdfIn PDF document text
    • http://hochrainer-elsner.at/upload/files/matojikopamakupar.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d56ad617df2---kovaz.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/jaduxitokixuni.pdfIn PDF document text
    • http://songhungthuan.com/upload/files/nopobapere.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/xukugubenimaxemedowagob.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c8da3252a48d7576e759cf7a937e1fb1/jotosisoju.pdfIn PDF document text
    • http://greenld.com/userfiles/8046208619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=lectio+divina+guide+for+groupsPDF 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_off0000f5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 16980 bytes
SHA-256: 69c0ba3f5f60e9ffb43efe9836c054b6052ea9aaf44c6b66b311c7f12480ec30
font_02_sfnt_off00013990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13990 10872 bytes
SHA-256: 2fa32ee52492d87eb8a69350b6676ed20ea30309c1f3de2bf65ccb2e6d5d28bd

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