Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ea6ae01375c6e0…

MALICIOUS

PDF

99.0 KB Created: 2021-09-13 22:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2a6d03582b5732f5dfdf77804c9fd0c2 SHA-1: aa8862a92f72bd266257c4a693de6aeecc7238cd SHA-256: e5ea6ae01375c6e0cadf551776afa1b6d28f3128d4b391550443281d27f6e06f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojanized PDF. It contains numerous URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://lovesenergy.nl/file/zojegatejaf.pdf In PDF document text
    • https://theshamrockpublecco.it/file/watakezum.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/bikadomovoponoruseji.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/53139295305.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021981387727.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/jajaxutamulitikenaduluki.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/zakojefogiwojetetudipe.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/55326437467.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161368bb5b6841---gixakaweg.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/5277760243.pdfIn PDF document text
    • http://www.bandungmesin.com/file/luxebeginafodulipugiwa.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/kuzawolosib.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/75094308586.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/23908289499.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/75793855966.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/fuzofabugifu.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/53623621293.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/bugomoxakesovoguzerifut.pdfIn PDF document text
    • http://promtour-rural.ro/userfiles/file/sologikevezed.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/36077647043.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/mizexoripaviloweroguxuwe.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/12105693307.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fac849c90---xawanozol.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161326e5ce2085---11438464169.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=wwe+roman+reingsPDF 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_off000119e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 20160 bytes
SHA-256: 78c21da690520d2f8444bc96e7d8f4bf7dce5ff94f92bc72fc68372b9ee6e0f0
font_02_sfnt_off000166d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166D0 10384 bytes
SHA-256: 88bc6325b4f85248eea4024d39adc85f3ed0b55cfabdd15c32f26c25608f8b42

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