Malicious PDF — malware analysis report

Static analysis result for SHA-256 4913f6289746814c…

MALICIOUS

PDF

154.1 KB Created: 2021-07-31 18:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e7efdaf48fa87152ff7d33e54f82ac9 SHA-1: a475258dd79584af94e989f22bc3c3229e9dc059 SHA-256: 4913f6289746814c8d469b3a09f269f0891bab01e2ac4582df14497ef1083404
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. 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 https://drafthe.ru/uplcv?utm_term=sylvia+earle+underwater+hero+ielts+answers PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/0111578bc831bf875d5e36e73653a16d/wazifosimigafa.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/82272794305.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/e46a7632a5e0f9a6bb95dc193545cfff/bikud.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7846a27f1---12980596658.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074260549ed5---fisafuwele.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051211524973499.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/porezuzezazi.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/zederudipog.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/xuxuregukini.pdfIn PDF document text
    • http://innotack.com/userfiles/files/wimowewam.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/6cbe57692aaedef3f92be7d8ece9a11b/54761731460.pdfIn PDF document text
    • http://anpo.vn/upload/files/renokiledoxazate.pdfIn PDF document text
    • http://altinay-law.com/images/file/lonixenodane.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/gizojid.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/25598141668.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac770502eb5---fudupagarotuvesid.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/50651541489.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/92858477721.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jadewaxilimij.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/koxanodukemobuxuzerixema.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/kodolatotonu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/03e4db7509ead7a38fecca461575d146/lapegobiforoxaj.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/jonoboririki.pdfIn PDF document text
    • https://airbays.com/userfiles/file/bonixobobewiv.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/39968353865.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_off0001fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBD8 10788 bytes
SHA-256: 5c48aae8758d4403bb2f43b38cc591a3e091f2f0ea67f17ca48109ce0bc198a7
font_01_sfnt_off000214a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214A3 16780 bytes
SHA-256: 5bbe9500c0b794f353bad0f19abc4884ea749086aaf2ebb2e34e13a7c71c2a77
font_02_sfnt_off00023fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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