Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ea2f96e29c78fd…

MALICIOUS

PDF

85.9 KB Created: 2021-07-16 12:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f49e6717c2705cc1464d3173f3f32517 SHA-1: 6dc8d1be5b26c848fd49c71ba61d4c8c41e8de5d SHA-256: 57ea2f96e29c78fdd5f1195585e27674d8df147eca7a98f051d471ff6156237f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites. These sites, in turn, host further PDF files, suggesting a multi-stage redirection or phishing scheme. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing lures.

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 https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/9a608a893ca82e0fc2094beeb4c1f1b8/juwazipejenekujaza.pdf In PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081dc0573da6---80474070024.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/9slv0s9bhm2cc7tsbq5a5dgn4p/tulipepid.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/juzagapuvune.pdfIn PDF document text
    • https://sanagustin.cl/files/13348940791.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/revakutovudukolixig.pdfIn PDF document text
    • http://senn60reunion.com/clients/876260/File/xuvatozajolasikabajakoz.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb50b148b27---tilimiropane.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/89091877691.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9571a986a64b3b22b9306cfc67450948/botorewaku.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/8h2ug85n5l9msrmel18pk4urtr/soranise.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/81897965598.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/pemopup.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b38df34db6---52949449143.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202105121051182775.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/dimaxezebixumed.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16098386e620e4---dubanokukosilofugisozu.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/mufiwivop.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0629c2c9447db2e1de03ca4e5373d46c/dawezeduwi.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765b591dd9c---3056901846.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce48b40121---72359913228.pdfIn PDF document text
    • http://strandedtattoo.com/file/90241524216.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/cgr6pl1l1mvj9r3ln569nr4rgp/tizijujenofusenotufuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cyst+on+side+of+wristPDF 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_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 16240 bytes
SHA-256: 5acdec9e83a1ab8cbcefb3a53d762081ca8eaa40ed3699303b3fdcca6749d27c
font_02_sfnt_off00013301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13301 10372 bytes
SHA-256: ffb0bcdf941a1b18ce411acc86af64b487c3e3c1c18f19048bffd72c96bd71a9

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