Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a76907b74f477e…

MALICIOUS

PDF

86.9 KB Created: 2021-07-19 12:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 408e00f9cc070c7bc8535c434839d310 SHA-1: f4dee33f030e71ba56127d5d8e055d0d94ca21eb SHA-256: 01a76907b74f477eae7f3e392d0faaad26fd41462d2c03eeb808d9ea9c1e8925
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting and the use of UTM parameters suggest an attempt to manipulate search engine results or track clicks for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa5fd8047---gesonizoveguto.pdf In PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/45364056585.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/55206496976.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/4b13b549b16def4a618e0977dfe71dd6/59454068899.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/74783341134.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160919e893c073---miwojafepifiwin.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/demamagaravomijujuzokenat.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/wufog.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a811c3c66df---14660064845.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2e8d24c11---zetifutokixata.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/14533705284.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/dazirik.pdfIn PDF document text
    • http://xn--299akc5b432k2sev7g.com/FileData/ckfinder/files/20210708_DA5CAE1F32071AB7.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mogopekezobemo.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c60c67379a7---gufigepujuv.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/11190110437.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/momikafojatunekaro.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/58582462175.pdfIn PDF document text
    • https://citytrafik.nu/images/file/tesesorer.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/f766c12ccfa0bb950023d2e5bf5ebe83/95810439842.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/rotomogutunapo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/gf4mcb9vrdv8ohhcs1hnc7eq1r/91684029987.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/jilub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=when+to+use+to+whom+it+may+concern+on+a+cover+letterPDF 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_off0000f15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15A 16960 bytes
SHA-256: ac3600e809e5b0fc9a233f373d45da8c1b5e6cbad9c7ff9532948649d8668952
font_01_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 10852 bytes
SHA-256: ec2a835257cc2eaf814f46c12584e07cceb1c6f31fd80c926d7c7659459e2af5
font_02_sfnt_off00013627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13627 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1