Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b1e66b4f94a45e…

MALICIOUS

PDF

86.6 KB Created: 2021-08-17 06:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b07e8772bf61baa87e17c88673f8164f SHA-1: 0cb85d528a193d208899cee52ab7f9fab9464ad0 SHA-256: c1b1e66b4f94a45ed6125a0fe5cb4c1bb93bd77f8c11bd48f370f250133f9b76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and is identified as a link farm, likely intended to direct users to phishing sites or download further malware. The presence of multiple links hosted on compromised CMS uploads and disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://chcial.ru/uplcv?utm_term=dyson+ball+animal+vacuum+instruction+manual PDF link annotation
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/u786ul50luvau12ood56c8lvj4/lupuliju.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160869b082517a---6300374611.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d557cc000c---besubalolox.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e7fd3734a---63665970658.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/keziwenegagapasob.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/44245680914.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/0965b9a8fcae780263c22a7cdea29ddf/xamibitaxejakomobuvine.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce3dda8066---67372422551.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021070618374195.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/40076410971.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/ligofum.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765484436ed---soxaxal.pdfIn PDF document text
    • http://rcsiprojectracker.com/userfiles/files/35644864575.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/lgl839ca61v6q8ddrmjms9l9n1/wusolovakofaz.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/sinibovufumex.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/e9ee67a04f474a34226650cae00fa826/ridikikapopinirig.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb75fd9b1e7---xulemaxamazikiseme.pdfIn PDF document text
    • http://mosjob.ru/images/file/basapomoxojorasikufow.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/pagise.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/e9c7dfa46766051071bc5fcac3f63573/74037832213.pdfIn PDF document text
    • http://lawngo.net/fckfiles/11183112467.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/58995463218.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/melubulizigebugej.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_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 17212 bytes
SHA-256: ccc3fb197f0d5835b2cbe0f568091ba0eb4b594661a2643d9a0d520b669b3679
font_02_sfnt_off0001337b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 10680 bytes
SHA-256: a17b6878ac41d62b4e3193dfacbb4e0472ceea50f8d6b9d958680e9365c84b8a

Open this report in the interactive analyzer, or submit your own file for analysis.