Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a95fb969ee5df6…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 14:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b5a2cf37a52b786315f83083dbaf447 SHA-1: 3227a4b2ed1c991d8b8d16c16a7ab0f135531544 SHA-256: 20a95fb969ee5df6766e702947c3df8d845c5014ca9043e1a9c91a8e18065c62
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, including compromised WordPress uploads, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://irlanc.ru/uplcv?utm_term=botulismo+tratamiento+pdf PDF link annotation
    • http://wallsfamily1912.com/clients/876683/File/25220095070.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/52350827612.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d360c9a7d92bf97a695ca75814a088dc/runapoxazudul.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/67328460159.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/pogimena.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608598a98e2d8---79051198877.pdfIn PDF document text
    • https://camelcarpet.org/d/files/tadakagerod.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/68529729962.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/56040888072.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/tawivuxixerupiwomamuw.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/lifobutobodolomipap.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4c13aecdd12a4c71a1631b759647f855/12453743905.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fc23f400935---fisogivemupixelunakabev.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gizem.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/95313122223.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7f2fa2e38b---95340081628.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5da587d03c---4452072968.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/zuzepuzil.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/70994525125.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kf1hn4g9c54dmbhaie4d0c8ja4/25865820701.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/honeduh9dskh29hfrvs0iv77id/xavinidurusiboripexut.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/28896822532.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_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 10812 bytes
SHA-256: d77d1c099116704eb03532f45bf7a6da52cafa67b1ff21a2ff3a65c40b1b8df7
font_01_sfnt_off0000f9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 18240 bytes
SHA-256: dfcf18089e9f588f6d10bb06cbf3bf95608deea114786c32c5136ddc0decb714
font_02_sfnt_off00012848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.