Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b07450b56756304…

MALICIOUS

PDF

77.5 KB Created: 2021-08-12 15:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa3a7122799d9806929338f1e9d6cd55 SHA-1: 3c8c202c1cfea537e45b7513225636d89ecafcbf SHA-256: 0b07450b567563044880784ee6b438ca39faa8efc3d7454e7ed0f09ff4b796c0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to lure users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://spreewaldatelier.de/img/editor/file/watibomebav.pdf In PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c170023f0b3---25784686491.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/furozerowedidewelemerol.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/93800905924.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/26866339606.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/perisovojevimugum.pdfIn PDF document text
    • http://allycatering.com/userfiles/gozojiguke.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161058ea78cfcd---52508137490.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/ladudanes.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f75fdbbc75a---40102773044.pdfIn PDF document text
    • http://bastola.org/userfiles/file/xalulawazizumixisajo.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/36862761237.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/kafumovuvutikojekulit.pdfIn PDF document text
    • http://esistore.be/userfiles/file/63007560691.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608098fbbbee6---69767921500.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/473321ced0fa0c9dbb2882f6f3e9fe2d/gilixebamotivasi.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/f6ad09bad3725c0e4872d1ec924c5111/4389257638.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/16236871031891185360.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/35830708152.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160869f43ba582---gagavudigerurur.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cb989e86---81731627291.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/33520070110.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf200414d3d---16525188579.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=pasos+para+realizar+un+algoritmo+en+informaticaPDF 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_off0000caae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 16272 bytes
SHA-256: 6745315b08ce46b6bbac2f7b4192ea4775be0332f0749d7f325f0f660181c0bc
font_02_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 10984 bytes
SHA-256: 9559792d08eaa4b1cbe72b0d8a98d6dcdded44a71af825037a06da5676b0159c

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