Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bced10ff778bb2…

MALICIOUS

PDF

84.8 KB Created: 2021-07-13 17:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b07a05ca3a7b114651c3b3c60508393a SHA-1: 5af9c16b3b398fdb0db741bedab6597dffa4a406 SHA-256: 95bced10ff778bb2f83209e8df9041861d16da07ae9bf2df65bae493c1aace07
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised CMS upload locations hosting other PDF files. These PDFs are likely part of a phishing or malware distribution chain, aiming to trick users into downloading and opening further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bffced66bd9---54632130863.pdf In PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/d401403f0b8a90df3a83e651c4e88a23/10110267839.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/nebadexojizisaxujug.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/568984063.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608566dd6dfe1---zetajeboninow.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/zulifijibexenovisul.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30c76a8c3b---82377860264.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608585263a4de---jidemopevelasaxekizek.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b09f891d783---dupaziwef.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/4crhn6loe4ql5i7lmtrflf2gc2/gojatabisobilulixowezoler.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/derasedesex.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/co21gsr3vq60gm1ttaeu76kjk2/59776726017.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/aq67h8khn91m8ndrfhehbtvm0l/7037864549.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077579acacf0---defuguwe.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/gidebovi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffcf1f1f19---37906260124.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991c863a88e---duselamov.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/tatisoniramutumawape.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b0e53137---rajusejezuwusodumoditu.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105310937.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/tojupesujujoxafi.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/d8b33cf3f03ac0af92777bf2b39db09a/416800181.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c7974d5c8b8---zaxaziwap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=certificate+of+compliance+electrical+workPDF 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_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 16816 bytes
SHA-256: 3a6b5b6bba854c847d91d2c3813b78bb0fb5b0c98aa0e871395ba4ce8efdacef
font_01_sfnt_off0001132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 10680 bytes
SHA-256: d84eac7c5452a7e12500b31bdc6279c3181912c26c098e2c8cd2094df79b1546

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