Malicious PDF — malware analysis report

Static analysis result for SHA-256 70512433fc373885…

MALICIOUS

PDF

73.1 KB Created: 2021-09-29 01:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8ef3506eec61bffb721035203668b356 SHA-1: 9e4a3b9474136b179edbd76db6166f359d416dc3 SHA-256: 70512433fc373885eebd1af5c905a96cd6d987b8ba52e13adc512e8183aea8fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 various websites, some of which are hosted on compromised WordPress installations. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://infrive.ru/uplcv?utm_term=the+conjuring+3+full+movie+hd+free PDF link annotation
    • https://pankajplast.com/ckfinder/userfiles/files/11032379505.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc52d8e175---29053313911.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/fb641ddb23c322fcda28f50cba782476/56360360213.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/tipimap.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/45111425079.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/mavaxaxeji.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/63184966247.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/metokexixopiregovasedus.pdfIn PDF document text
    • https://value.ae/userfiles/file/woximutedowat.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109151438208627.pdfIn PDF document text
    • https://reniuved.it/file/17150772546.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/7328755280.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/fomigukuba.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/gawimogam.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/vanatotezipej.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/fedumutat.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/rikijixagivudibesejul.pdfIn PDF document text
    • http://guowangcable.com/d/files/95819587993.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/65672417893.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/zisibajasi.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/81063267343.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/felolafabagiraku.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/dexuvunomivulunuxa.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/95342511556.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/19436226834.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/78713089725.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614939d76bc11---wutepumovekeragavab.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_off0000b866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB866 10924 bytes
SHA-256: 94d80e306c8e1f6e4d8e1e1e7ff2b7c2091d39f51b10a60c7c392a6975e9a3bf
font_01_sfnt_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 17360 bytes
SHA-256: 7144dd187e9ca69cc5cb442972aa6457dffde74af8f4c356c2840719aede6231
font_02_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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