Malicious PDF — malware analysis report

Static analysis result for SHA-256 269f914d78a5a3fd…

MALICIOUS

PDF

93.7 KB Created: 2021-07-01 15:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eaf0edc33d1c10c1ca2e58ed53ce2689 SHA-1: d968dc825aec6cfdd28a8b71f81e48e505904207 SHA-256: 269f914d78a5a3fd537b554606d3e5fa0737c8e9d84a3dbb22b06e725da81910
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to distribute further malicious content or phish for credentials. The presence of multiple links on disposable hosting and the use of UTM parameters further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://ketchas.ru/uplcv?utm_term=sermon+on+trusting+god+in+every+situation PDF link annotation
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/3q8j11d6oeh4lvame9eh3k12mu/gokowasakasun.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/pugetebezano.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/1jp6hc6agsumah14pn321tu076/67773096442.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/fobed.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d95c75720a---rewegadebovosiluw.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/25739732753.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/vuwatasopud.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/9922bdc4b73dbf41988a29d63b576015/gogaviworisasadi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/i1dcighur10ue61sa0o4dqukr6/4177616268.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/zufonu.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a0397bc8c80---45824788119.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/wijar.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/c56ca1d780dd2f60452d237ee7e2ceb2/36040367931.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945271cfdf4---51086020840.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97e4811b55---xexivijivojezetajof.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b939c8994a23ca04fcdd08df4eb6f36a/rawevubobimal.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/08d810b40310384817e49254e15eea81/76570264591.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d8045357d64---69277707256.pdfIn PDF document text
    • http://remobudostol.pl/pliki/vavasifuboviduxo.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/69395753042.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a99aa06f5---demefowosifofa.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160868d2477bc4---77855732068.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/jolosilimajuxomewabisakaf.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b180b126beadf0daeaf1898a60398d69/wavisegaxavuv.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c608deda599---jibokifagukujizifob.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/67835577980.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/uu97a1i3jspjih2crv7rdo7em3/lisoma.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/48656306538.pdfIn PDF document text
    • 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_off00010984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 10900 bytes
SHA-256: 22d6d993c521cfd85077c6e58cc1b3f8079defffc10d18c7951559c4d53d29a6
font_02_sfnt_off00013aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA1 17172 bytes
SHA-256: 1f860a9b116e1bb1863af9b0f04a51fef691b3b9df4704dba9fe1b4305b33d0d

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