Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c446c06b1d84e8…

MALICIOUS

PDF

76.7 KB Created: 2021-08-03 11:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1840712a3651514617cc639572944717 SHA-1: cce258da31f3be3979b0008de565024c534ad17d SHA-256: 01c446c06b1d84e8a8a310de9f85f3021d61215279078c374858b0319c563161
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of multiple distinct hosts and the use of disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://luxcottage.ru/stroykamen/userfiles/file/ximexixujabozar.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a48fe37d03e19c97ccdc8831b0183d89/dexuvasojasinog.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ae25ce9b128a236a9842b075f3a360f5/4586667659.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c2309d994a9614536de7ae5886142bf8/fejakuwenotisubibujipu.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/75734285997.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/99644331582.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/7713981173.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7f6a1af52---fafanuvagevez.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/c3e34ctusjov9asihgpp56sr36/11059888317.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/jafawamu.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50283963247.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078b438bdbe8---66804471985.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/0ed4e1dbcaf893d2ed155c2b7d30d11f/68762497078.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e3af18e92---renokamolabe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879f1d8a8bd---jilubuvifunepusadodawor.pdfIn PDF document text
    • http://faithartists.com/clients/877397/File/kesefilodozanewabik.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021071812130128.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4efa1bee00---13186162787.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/43558460018.pdfIn PDF document text
    • http://idroter.org/userfiles/files/wutozipulelafeni.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/bdbce2e0d4b0746390fcc164e17110f1/68484637432.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/makinidixakalifonebeb.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076a85628c31---3850363814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=does+lifecam+hd+3000+have+a+microphonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63B 11148 bytes
SHA-256: 1bc3c7edda97d2312dd88cb0a6434867167c27072568758b04e5330d794446b3
font_01_sfnt_off0000e012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE012 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 17340 bytes
SHA-256: be2c17c92ae94d2c7528957d9ceef93299caa3dbc7f89f148179bc1ed3dbc66d

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