Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0941a40d47c8cb7…

MALICIOUS

PDF

86.5 KB Created: 2021-08-04 14:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 447c78c4df3e7a1696fb8645214d9a1a SHA-1: 86246bea478e7b0a823972f85c0e6d3ba846f263 SHA-256: d0941a40d47c8cb73ad6ad1a3d7d72e22b15829fecd3f20e0a666c945f48434e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating a distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of an attempt to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1b5ce2936ef26b2d5740fab3a9837758/sinomokapadijikareluko.pdf In PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/l0vb0n8av5mhr698g1o29pgblk/17485787475.pdfIn PDF document text
    • http://sparkpro.lv/content/file/77188067648.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f9832e0fc9d6bb3f2d9fe52a69f799c6/94069873127.pdfIn PDF document text
    • http://jngf.cn/files/file/vagusibumawekojibir.pdfIn PDF document text
    • http://potlista.com/file/files/35442445070.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c65fab6b1bbb7f1112676a85978080e2/84049345166.pdfIn PDF document text
    • https://careoncall.in/userfiles/files/pabomafilonagotuxenite.pdfIn PDF document text
    • http://isgsrl.it/images/file/37217085635.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/zedetolegapijanonig.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e8d506c6---28745994313.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/2874501185.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/72029521356.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210628_75E4055316304811.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/tuninakuj.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/bbab531c7ae921358a853c1fe5691e42/66167888333.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f81f5eb5385---ragizegukovunodorixagivaz.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ermveklmp4igj5qqego4qt6tv4/63855067317.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062804523573499.pdfIn PDF document text
    • http://starringthestricklers.com/clients/2/2b/2b6f34f03d9ccbd43d04a050b3ab825e/File/18347562553.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/tbb5bjj7v27gn1e1hnpgl3enkc/pivitipexenevu.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/66007759765.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9a7cc7e7---nukizibebusorututidotutub.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/51540690403.pdfIn PDF document text
    • http://www.bash.cl/media/file/xidetuxumazonupufowi.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f92d8c980---lakolowafonugux.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/7s6ah4sdvbhoehdg0iphjqpvj7/60489841778.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc04b1d1b---66853043044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+twilight+saga+new+moon+hindi+dubbed+480p+downloadPDF 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_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 17128 bytes
SHA-256: 16da77fd3acde52a1365e12e7a571de3c157c1300c8342e66a9a44e23e148392
font_02_sfnt_off00012e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7F 11436 bytes
SHA-256: 5ea0b136a6ec347ae791808914572d0daef2b983c7b9601c13b39625b3b51373

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