Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eb18eab80f8669…

MALICIOUS

PDF

95.0 KB Created: 2021-07-06 11:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a6ee34c0faf968504d63921b7af85c1f SHA-1: 6e209e64327c50161162c3bbcce2256c8bb3a8f0 SHA-256: c6eb18eab80f866999e378ff0e6874ffe1494d03c56f83e04bec266e253856bd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9528

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://philabc.ru/uplcv?utm_term=absconded+in+malay PDF link annotation
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877d64da5dc---ripiwes.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/fa6fe78b9d329967c7a35c5ad82bc47a/3294079277.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/oncaeq9dajq924rcj9idru87rq/vazozato.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/28d15875f16830a82ca4db81a5b14ec2/vepinelavumexe.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090c3cb1665b---49242662975.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/tf83ao1hnposiandkkjes6q610/51896011715.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/6c221ad5e2b9cfa76107bdcd27ba91eb/68318189368.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/33093107722.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/undvvns1f7gfrgv6cca8iu7nlq/72423588157.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd20b4feb---bezasopifim.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/m9mpv39kte2ekf8a5s7daqod8j/19814544956.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/9l1abke6ekesiug2ev23anm69c/zosusadukomidozalijije.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/8561b94d844e77c45056d46618520286/pimop.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/3n0hbhb3p50kpaf63um56rejl2/57037617168.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021053012013443.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/kaxubivosesenorusominiro.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210612/file/nuxuzikezinebarexel.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/10177546868.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/25e636f9dca5855368be0fcd69ef2c84/21613335874.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82e886285---xirisomo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/4fd2948b0838de81d878db4f0e518b14/mireruzepojitazo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e0b921e48---reroserimumuwilaganevuxo.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/nalosogif.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/j0n45coc61lm20bufbqjcvd2df/72211772743.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/nibexobanijisinovas.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a78daebc380---noguvavonotunudevikege.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 16508 bytes
SHA-256: b15da6fe239560a755f44b549ed7f21a72c5ca32a667599fc194377a8402e342
font_01_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11214 21192 bytes
SHA-256: 2857ba31045292f41dde110099fc7ac76da93410ba70c1bcb34beda50953d899
font_03_sfnt_off0001489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489E 10568 bytes
SHA-256: 23a8aa36c7ff469897f262f7350acef58ac155504b23ee2a240c0046ab9fd0c8
font_04_sfnt_off000160b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B5 3108 bytes
SHA-256: 466cc6035feadc711a3943ec8904cf57bb18c0d5573bf500677378e2865a0dd5