Malicious PDF — malware analysis report

Static analysis result for SHA-256 061ed5ef025d7015…

MALICIOUS

PDF

77.0 KB Created: 2021-07-20 01:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 442481da177bb253057d659b84b4983a SHA-1: d311b1173e42a0adfa9b36c223f280a38c792c15 SHA-256: 061ed5ef025d7015ae47500530fb67e99f091aa4d7ede7a6f0f45006b2d771e5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious sites, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608538ad3daa7---27880022871.pdf In PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/31cdfad662f1b8e64a5e485a0ef9b28b/96848567885.pdfIn PDF document text
    • http://shiksha24.com/userfiles/files/10236316210.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/72373338252.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/28509369230.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/n09r1c79noib74hkucb1ue657s/giwudaforipesobebiwafidu.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/99069881172.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/61812352065.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10ae74016d---zaxarovovubopavulipozare.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/26891560159.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/50628631119.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7cc537889450f1378d1303f384cb4edb/kuxipewotem.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16083b979df6c9---josasenotuwijerule.pdfIn PDF document text
    • http://www.toptehnik.si/images/dojafapuduruwuxazabarifa.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/tadoluvilo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/8f926f6a9bfa9045edb0de07a7325177/14755182297.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///85562291283.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/rafegupijafi.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/memizigukovikiwitivixefut.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/rq06a2ad16p1h0qim0sfs7f89b/lolosafukunoxe.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/wepokevepujaluwave.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/44211428584.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845b858a82a---zopuvimogebuxu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1cedb9d449b5ba261f98913871103720/rijuvaxakikaranumile.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/duluvusabomixibafuda.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/c315pha0e0h8rgohet1lfne9sh/39241815038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=outlook+connector+2010+downloadPDF link annotation
    • 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_off0000c7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B1 18212 bytes
SHA-256: a84c4b12a4da55c228843258c541a803f2059a6bf926bc663e2ae463d0d2c7f3
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E04 10700 bytes
SHA-256: 293e48f48a702a4aa2291a561450d4d1e39194479453869fb17222cf4825fd04

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