Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7097e1bd02e298…

MALICIOUS

PDF

90.3 KB Created: 2021-07-27 12:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: cd9247eb2aadbe416deaca10e8d57910 SHA-1: 1ffe68e5948dd897190d700e5f2797b65f8d3ca9 SHA-256: 0e7097e1bd02e298ea27adc4e9b3dd0662047d1bfa8396f0f343b2fedda3f1a2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2eb20618974294a35e4778ed624616fa/gakoviran.pdf In PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e062fd7b---jejeroxosixakixofitux.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/5ab4900e8c69cbab8822aee1a18abd9c/suwemowoma.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/17399658868.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/vapevivesupezupipekanetu.pdfIn PDF document text
    • http://envigest.cz/upload/file/74441536276.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/20731450624.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ccb8d984---pisaxagesik.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea4f7bfc08---jegadofu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/zidojupezez.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/la5s7jit9ghm4c1ffqforl7ems/nafek.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/pokirisexef.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/88547437031.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/kinenujujojebujivinubag.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/99253471886.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a2be6383664613af16de44b670a08e8a/sedufokilumawotulumusa.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/84417284266.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210708175542_5xdton.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/kaxijikomimiwukaf.pdfIn PDF document text
    • http://grupophi.es/uploads/files/33032221056.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19d02be62---25950562270.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/wigibituxanonumajamafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pronomes+indefinidos+ingles+exercicios+com+gabaritoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 11060 bytes
SHA-256: 8cfdcb01f49791ae888684e34c1a75b03725572e277f5161c8a726e9c31df23e
font_02_sfnt_off000113b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B5 19112 bytes
SHA-256: 402c45a9946e95eefc4f7bf9ba1defd7daf40ba0ba840b047bf75b9dfee32b32
font_03_sfnt_off000142b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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