Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e86499046140f35…

MALICIOUS

PDF

85.4 KB Created: 2021-09-12 12:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0649c40fb885443f879c2ba8a68bee14 SHA-1: 930dcb249aea4fca1dcb13434800b754edbba88e SHA-256: 1e86499046140f359a1be7c1b09e713e3c93df7a0f393d640d7798888896d987
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised or disposable hosting sites, many of which host further PDF files. The presence of a 'download button' heuristic suggests a lure to trick users into downloading malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=node+video+premium+apk PDF link annotation
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/hsd5orso3do5g2cjpct3avk6md/43955957135.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/6487327711.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/tedowepokewalu.pdfIn PDF document text
    • https://network-italia.com/file/xotuvuban.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/20185367126.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/savel.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/wilamodoj.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/wasapafijewogupugubexab.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/nisifogesevonalajimunite.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/8158346832.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/govulojokegaxemexefuji.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2f709a12c---palajalijokaxomep.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/49139743067.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613db06f3a1c8---dimadili.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/88069556503.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/toravurawusaluvokig.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf829f558---jarutowigowituwoforovitez.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/34413652498.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sifurazukuxozo.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345aa99bc6a---39185334007.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/77686277229.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pokufabezujimijef.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/40995234417.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/55792196841.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/30452231581.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA86 17800 bytes
SHA-256: ec03e5ccd60e4a31c23b24f22b6cb808e6066efd235af483231b4f8991a31988
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 10372 bytes
SHA-256: 5cc1c5f417a86c2538e00bb284298328a427934c9ccba18c7f28e3a50972cdfe
font_02_sfnt_off0001300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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