Malicious PDF — malware analysis report

Static analysis result for SHA-256 130a040e167bd18b…

MALICIOUS

PDF

73.9 KB Created: 2021-09-07 23:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6cd074914a8bf124a2827fea2042ea51 SHA-1: 470b3f2d2e4d77d070bb013a569dd5a1a99489b4 SHA-256: 130a040e167bd18b4b01ad5305f0153750b36de6ecc50efe2c5f123f6c9fa51f
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be either compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://degrossier.nl/uploads/file/dudobavizubegegugemivev.pdf In PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/xavuvorevixanogubun.pdfIn PDF document text
    • http://servmed.net/userfiles/file/83469144407.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/tobuxawofurigapij.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/falubovuva.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/xagaxazinafexanora.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160766c3759215---mofuvapobejavelojuzos.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dedc5a7c13---nedakekudamuxad.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/xivuna.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/vojewewoxasaxasizifi.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c77791df884---xafopi.pdfIn PDF document text
    • http://jdhs77.com/clients/58520/File/pidadoragovegilagafijorod.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/saxogagizamivav.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a0bd7ed35---83031955333.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/76887779359.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f831e707---sekuxejizazari.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/5389844488.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/32022250064.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/dd029ec9ab493de6d4c672cd9101b503/77010669691.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607714b8f0abe---tupusuruz.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/95d2e9ce527c2618bebc52a2df72c906/45165470984.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/sexukerikaxidumikotunile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=alfred+piano+chord+dictionary+pdfPDF 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_off0000beb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB8 10644 bytes
SHA-256: d0cb8a7cb8ebf7767ad8fe7e1ab5b3757ef9ceee1f0400565d2d673a0b085136
font_01_sfnt_off0000d6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FD 16680 bytes
SHA-256: 56c07d765eac1e9432cffc1783b6db851de3fd9a56d50c64509c503e387527eb
font_02_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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