Malicious PDF — malware analysis report

Static analysis result for SHA-256 3264125d8d7a5fcd…

MALICIOUS

PDF

88.8 KB Created: 2021-07-13 17:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5cfd33622a37fae51b8b53786deadbf6 SHA-1: 5b78e44ccdfcdc0b53f9b6c5037216e4c9516cb3 SHA-256: 3264125d8d7a5fcd485b38dc48d06fa2aa74f95672304569676062c5aa059bb1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links likely serve as a distribution mechanism for phishing or malware, leveraging the compromised sites to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59112fbda---kafunuzasibugipejum.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/298c9daa2125862202fe06f1b5301d8e/tutedigenur.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/sukavesutemaneko.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7ip1fu77bv6l0gbbmpjvs30png/70396295042.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b45c8427b80---nifegego.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/67415647967.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6686e9e4bbbc5388d4a8d1eebf8c0eb8/10347843856.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160af99eb7efa1---wilemeserafuvamimabu.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/23324011a96f9692d87ab4ad9f6fbf8d/vilofidalutovurexenumu.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/mazaxigiduseverowojugaza.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddac96c493e---91065353351.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/54940372bd8f16ea8e333dc4db9d967d/50418782203.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///26185233341.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/8kr0n5pgdk4nqstkanmp2mhgf4/83013735548.pdfIn PDF document text
    • http://kelvista.lt/images/files/60925454462.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/e97364a381c6d92345458debedddfbc0/59751499660.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2ee7ac24c6---67868528206.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a48f04c19d25858881450419c69bc9a1/42454330310.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d0a8360ab52c5d0aa091ad9a4ba7171f/57199388438.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/8c1ds0nf5uarct4hogl0mcofu7/zebevefaje.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/24500810052.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc80af0bc7---gisageguwafuwa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k7d5us09c6n2crqutiu22ro8q0/19835578802.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608543eea474b---tojifarigekilobaginufutef.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/89197966149.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d353c80f---jorutajipomanuwupis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=s+letter+names+for+girl+in+englishPDF 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_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 17160 bytes
SHA-256: 23d01c8156841c4434c326445be4b0c498b97cedffd34b6a8b3611d3ff0ca983
font_01_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D49 10736 bytes
SHA-256: 2a6d0465622b58440229bde67d7f70a7481c0c14b3fbd452b71416b865370e44

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