Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f1112f70ab3cb9…

MALICIOUS

PDF

75.4 KB Created: 2021-09-01 10:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4c2fa25b15a9cd063d81508431cec71a SHA-1: b5c4bfb5eacc80bc848029936dffde4f05cf2aa0 SHA-256: 34f1112f70ab3cb9ca742ba395986c8e6daaab541a61cdcddbb4312c508f5328
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to malicious sites.

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6aa37f30c92b8e5994eff06eeb56af15/60623659826.pdf In PDF document text
    • http://royalgoodviewresort.com/Uploads/file/fupiwivawesorivokigel.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210605_A86614FD7BE7A4F3.pdfIn PDF document text
    • https://ikima.fr/uploads/file/teposimezepef.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea6d7056ad---89560350566.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/86022430350.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/pesedejapegixutegirizoxa.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e18911dec9---25409883.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/99c72e2c34082af2e8f6d2dcc762aef0/70762130238.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e2a3245b4---99090316118.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/refotovujukakarosokera.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bccd11edb5---punasepaboragepibow.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/58882601945.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/70859660088.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/sojekakuvulowumexasadaw.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/nukivatov.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e273a338661---repugogowik.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/muwilifenajavuxidunusan.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc30c1a596---74992182038.pdfIn PDF document text
    • https://agatanorek.com/files/file/25568868173.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/98042473233.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/28105210389.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/9678028477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=boy+skins+for+minecraft+pe+downloadPDF 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_off0000c309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC309 16228 bytes
SHA-256: e5cac269d54f17d4accd87470f9238815f24b2943e582b23b6911e6a0b18c9de
font_01_sfnt_off0000eccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCB 11128 bytes
SHA-256: c0399934c11f0f6524872796fb6575576b08825dd49ed9aaff90a4a86dd1f624
font_02_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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