Malicious PDF — malware analysis report

Static analysis result for SHA-256 1700b06a6bf6ea10…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 21:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f439ccb5cb139b87288feb736ccbf256 SHA-1: 502402baf296a9725444f89f0a8426188ab699c8 SHA-256: 1700b06a6bf6ea1025ab51bf19a17fd67a3d7bab7c9a51d7e814aa60c2550d52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of external URIs and link farms indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=the+angry+birds+movie+2+full+movie+online
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b48991bb035---darosufudaxeledozi.pdf
    • https://b2cexpressdemo.com/userfiles/file/bekelejifubij.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/7nlldcm50gmklvrt26nmg5hcu5/wovaselesubepetiril.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/v60r2kte9809niboqjnd3utf26/80542128711.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2c398aaccd294a49a1e2278a9a98c275/22048418318.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/rueidijuoj5d35bu1rdmkal80f/20637499733.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hdgegamrc1an4u9jg8nk85sk65/laxivagizipoliluvitatabuf.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da05e66d57---24709305673.pdf
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/32949924585.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608de31492cb2---9617949303.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/41852550790.pdf
    • http://sklepjola.pl/userfiles/file/4001174628.pdf
    • https://dgaspcsm.ro/ckfinder/userfiles/files/wuwitozono.pdf
    • http://com123.vn/uploads/file/deludolebeg.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/41383617028.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc740f4c5a5---97437240955.pdf
    • http://qiangka.com/ckfinder/userfiles/files/feniwulo.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609466faecd06---sodapivosikijadixijel.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/it39ad3uptkmtad1bahcsbsrgv/22243145460.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/adf7a686a4a1c225fd171d8cd1e861b6/junimimu.pdf
    • http://quaint-house.com/4612739409.pdf
    • http://phukhoabacninh.com/images/files/rufifafewu.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607880d6af790---5519009479.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836f1508263---sasolemuvetujowugit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 16792 bytes
font_01_sfnt_off000104ca.bin
21e6d0cdea8b9980ec4264dcc59c6691559008c96ad31b899575546e70157c40
pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 11204 bytes
font_02_sfnt_off00011e9c.bin
3087d8554dad10c7aef1a2620ddd525aeeb2a12e2b9f879bf59da58033e58249
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9C 17376 bytes