Malicious PDF — malware analysis report

Static analysis result for SHA-256 46794ab70e14efa0…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 07:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 66d9e1c023ee8663389523deb3deb0f3 SHA-1: 925d4ff5314e23f0fcfd06b306c78ed6600b33d9 SHA-256: 46794ab70e14efa04e077b5cbc89247cee8537a68807e95439f6dc6cdaa5db65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs pointing to compromised WordPress sites, forming a link farm likely intended to redirect users to malicious content. The presence of these links and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a2eeb35f9---76848993522.pdf In PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084054abd469---1842052013.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/konano.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/zosatunimiretedimeso.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/572464a64cf5283c387d88369864107c/gawigakisedisubeziwurogoj.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/tuwusoxixunidoxam.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e2eafc19---9956550595.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/xulizidejewigimonog.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/zinibilosebogogepeme.pdfIn PDF document text
    • http://teplospectr.ru/images/files/pawika.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bc57dc6863a---54332642309.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/widoteburadetopawi.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/3e8b2bade51f074b3bdb2ce4dc8eb5d4/tunanidalasijavide.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/6aba55fcc10e4d9339fd64c494e37000/tafimusidurotetavekimul.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/66949902738.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/puvemizax.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859aeb2f45b---17086133095.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae5938dbe---xowapolejan.pdfIn PDF document text
    • https://teyadegitimvideo.com/calisma2/files/uploads/86720046191.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/45625715651.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3d519690d3ad3b7246550ab72002514d/6783719036.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081189de3cc2---39748171172.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/74db76a0705fd787b30a771ae2dbe3ba/futafadapevuba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=let%27s+go+toPDF 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_off0000f20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20A 17584 bytes
SHA-256: 92d507e47f10c33b0c6a937310c645a3101857a2261341f1bb22c491e4900f19
font_01_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 9768 bytes
SHA-256: 543d6e1811b42597325fe292134425db3f4438435c1d576f747cba5e3c864913
font_02_sfnt_off000135b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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