Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ed8c9c5b9fc7e0…

MALICIOUS

PDF

75.7 KB Created: 2021-09-03 01:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d9a5ae02f03300e87cb448383a8dc85c SHA-1: 93e91e55f0e1ae7915d4309bac2f7ab0dc024f59 SHA-256: 01ed8c9c5b9fc7e05eab133b1832a34d9031f48238e344ec893adfe7107f565a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=chrysler+300+touring+2005+manual PDF link annotation
    • http://mjsolankifoundation.com/fck/imagesfile/23467721688.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/24262886353.pdfIn PDF document text
    • http://mtcnx.com/upload/fckimagesfile/80655621374.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/k0t3fb5jme4p2dfuqki3ca5vtc/zibolazirogubijigure.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/harj9qao24fc5ctg0ed67ooi55/33017426671.pdfIn PDF document text
    • http://dztechfin.com/upload/file///tumezubesugokimek.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/4a73863e76d64fa1a141b4b427378d59/9710155842.pdfIn PDF document text
    • http://praguetransfer.com/files/file/60578069101.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af6773123f---sodasugonuxof.pdfIn PDF document text
    • http://hopkim.vn/upload/files/towimomuguvumowugamutim.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcba5f9cef7---91904113613.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/ziwimudezumipexivoba.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/xuvejajotaxotuzi.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bff94e7bae5---marokomisabelunovola.pdfIn PDF document text
    • http://domplus.su/userfiles/files/sofajujak.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/22639399055.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/vazepalalokilezem.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/99634049202.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/di8seqvso2mo3hqm1mc3gvrclf/menoloxukexubuw.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e954aa92c---gopepefexibawobiziru.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/96184748427.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de9120eba17---47959163169.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b701ca0668---80234775040.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/21946971016.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/5912000127.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_off0000bfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 11348 bytes
SHA-256: 0220af51f4cceb738879e2e01395c6a4434caf81d0dc69ed9467092b470c4ff8
font_01_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 17780 bytes
SHA-256: 7896aafc7b4e5cbb720dc6f0c77b54ab4d143176abe54b58022d63654efe0366

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