Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48e089bf705af0c…

MALICIOUS

PDF

86.6 KB Created: 2021-09-23 20:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8bd1df5d7613376ba5b0ac8c2f147edf SHA-1: 5125367083a0fa4b7ad6c8dbc729e8ad102eba22 SHA-256: e48e089bf705af0cf76eeed7ce18eeabf51322c312dcaff8d84fd9e638f4c6d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various external URLs, some hosted on compromised CMS upload storage. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic to drive traffic to these sites. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=new+movies+bollywood+online+watch+free PDF link annotation
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/bamedabixavadike.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/62235815869.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/xofusuzizunenowijir.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/56073202448.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210919111716.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16136f4f594e9a---72072382558.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/7439364646.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/96384193422.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/kelubix.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/63283778754.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/63745071001.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/64727209640.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/fadasapogodiwoza.pdfIn PDF document text
    • https://noddy.nu/images/file/wimewolinura.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/45719513364.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/palolipefekafikuxiboxep.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/wavipumatixomi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/46d0589a2c066c329291d557c7fd1d82/dejisexixijipog.pdfIn PDF document text
    • https://profesa.net/userFilesfile/bujiwepufixiguguzir.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/lisopuvinigumavedej.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5436b9672---sorafo.pdfIn PDF document text
    • http://cplust.com/upload/serback/files/20210921031435.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_off0000e915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 11124 bytes
SHA-256: 587325c0db9b24fc79bbe8c41b640729945147bf04b2f15a7991155f4ef1d50f
font_02_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 18676 bytes
SHA-256: a6fcac57d291a017331bcb04ac29eb7834b4a3d3741376c3bc0d24a5784936f7

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