Malicious PDF — malware analysis report

Static analysis result for SHA-256 329356a2f760fb03…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 11:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 075aa0c65317514bbc05de90c911fd6e SHA-1: 3ea9822474a13eadb80613c7dcd98f237aeaa8df SHA-256: 329356a2f760fb030c191c934cd66236c3d8bf9eccce2326a8e89229dacdbf9b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of many links indicates an effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://huntic.ru/uplcv?utm_term=sweet+and+meat PDF link annotation
    • https://luminex.pl/upload/file/jeguwaren.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d59b4c99bf---14036500187.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/bujudevuzoxafanopur.pdfIn PDF document text
    • https://subarini.ro/mm/file/56745174892.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/13003906601.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b7aa4371eaaf25056618884b79e3d016/59348317093.pdfIn PDF document text
    • http://olympusflights.com/files/files/26594243247.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2ee2f0424e745f830cd3fd478d9eb373/nofodulugun.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/81b3c9775f304a0efaf093df1c0e5772/82615787240.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d044b7a671a4df56b7740686db8e1746/zowuxokagomawide.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d00bfbb3429---56165527172.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/986068465.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7033749278.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210820_142639.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210801021654.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/tisus.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4e54c6552---mudugituwela.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/509v0h5pp5kfm4vpe5gqbnsck5/napekirajigebarive.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160826efc3f96d---xebenemul.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/11646644175.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/odjebtmr4rv7ajpl7fbd394pum/25255327559.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161025e37210b0---vurujizigujudaze.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/miwubizolasazenivow.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_off0000dbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 10044 bytes
SHA-256: ce7b5ae75b4e4e01f3cfffc7a80a7710e60e3f2afbeb8c5ed024fc95b91d043f
font_02_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 18640 bytes
SHA-256: 46231d8096a243d9c74331841f199ebfc702408b2c5bf79fcba862cf627c5675

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