Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f2bb6f712a650b…

MALICIOUS

PDF

71.9 KB Created: 2021-10-05 08:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f0f40f4da977e5ac80c96912745741e6 SHA-1: db86a44f4e7364a1903e69caac13f0761688cb25 SHA-256: 84f2bb6f712a650b0dbdae2d6909483c4ee8f8b38d8bc42879e03f150995bfec
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a raw IP address in one of the URIs is also a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://stagticket.com/fck_upload/file/sipenazuvisedepasizogo.pdf In PDF document text
    • http://studiofelician.com/userfiles/files/wiwimola.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/19212290368.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495d7fa4ff7---tetavumixilipujekuxo.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16156153a28dc1---62636076502.pdfPDF link annotation
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/nunalit.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/xosemukuloxajulin.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615141cb721e6---putidag.pdfIn PDF document text
    • http://carbontuning.ru/file/fakixow.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/94987352333.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/ruxaboluxotonominunit.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/foponotebepoguvaguxak.pdfIn PDF document text
    • http://espwireless.net/uploads/file/94466822527.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/96767757950.pdfIn PDF document text
    • https://ip-pharma.net/data/files/mififuluwinataxuranig.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161325f8ad4332---xawulefowuwupenojunezivab.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/bizefukivaparilam.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/10886222830.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/38451392177.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/tivokifufilopazunofun.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/lovajuvimujoruxudive.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16153b1c486110---wijaseji.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/48844695527.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/karenewovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=eat+for+health+pdfPDF 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_off0000ba07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA07 16248 bytes
SHA-256: abd1f395c7193d7c5bf9c74937890301b1af5a7902ed6cd75eed4015548210be
font_01_sfnt_off0000e363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 10212 bytes
SHA-256: 5631466854199528440fa50475cd7c8296af5dca16e577b2b512b6f19ba7222f
font_02_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1