Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a2511d06b5f50c…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 17:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5c2b06bcf655a312fe0d0caa02e604e8 SHA-1: 66f2055fd2a9cbcf07226c1ee92698310b344b56 SHA-256: b2a2511d06b5f50c314f9a06efd9bd7bd29aa92b840cbed4d73e48bf2bc01975
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of these links and the overall structure indicate an attempt to lure users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=micro+teaching+pdf+lesson+plan PDF link annotation
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c52bbdbe8---518956103.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tf5k2rnask5ul7mk6ft7h8pbh1/gazodijujorajitom.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/wesodafuboro.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/8e500d52cded3a327090865d1ea8fe1d/gubej.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609199cf8837b---65203982127.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/cabf6facb37225da765e25ecedbee851/nufivugonarupuji.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2fh7sljlp1mi0edtptambg5qc1/60723246329.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/49728509670.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210901_153627.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/morufovexatilagenibu.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/fusinereromijozuv.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/76579830012.pdfIn PDF document text
    • https://thietbiytedaibao.com/media/files/42505937477.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/27577663906.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df4703755ff---lugawaw.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160804638a445a---49083174240.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/sogagefifogobudisugazuz.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4843e43dd8---60512278346.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0441136001620711785.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc7b995f7c0---61522118784.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba372b912b6---86635395730.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/65535349707.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/43461583877.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_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 17612 bytes
SHA-256: 0ed0c1bb805f7eac9112d36ee4c09a01ce33d22a29a56bd106a38dea9596e871
font_01_sfnt_off000109e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FE 10892 bytes
SHA-256: e74f80a06a31022e24e3dbafb24b2408867f384ac761a7e3215b31e21771bad8

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