Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a005816bbf2bae1…

MALICIOUS

PDF

96.5 KB Created: 2021-07-31 02:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 752c28950f11ffecce51518c66af2a7e SHA-1: 7dcf72c95095a7d328aaaf1bb5fb56de42f233f3 SHA-256: 0a005816bbf2bae1b301b6c536cd6c61067aaaa96cea87c7ce01f27a9b306e83
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://bachtungcompany.com/upload/files/50312224734.pdf In PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/474ad32871452e38c15a16a506fea701/nojebajuwunijulobet.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/77cou917nk3m717o54vgq32jir/38548619803.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/18458415008.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22caa41160---mutut.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/zuvugetaxa.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/juvatisuvoworu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3412d2528c---76355340233.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/75440263133.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d1a93306---nesufodejide.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/a9141c4aaec0444fa92de7f03f5e9604/neradirizokerigemopefe.pdfIn PDF document text
    • http://starsunited.at/upload/files/benonodegesidara.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/9584183948.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/vusosites.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711f2235bbc---pedizobode.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f44c2b52---tubemutagapizoloxukes.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/xigawiwap.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/19251473223.pdfIn PDF document text
    • http://poorclarescork.ie/images/tetavuwatusu.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/a0f53c7dc837c35b75b07027c2a9ff5a/26682824615.pdfIn PDF document text
    • http://apsons.eu/files/file/52895137088.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160827af73fd41---4958080890.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5196754058---80239865817.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/98505091981.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/gogix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=physics+ia+ideas+at+homePDF 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_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B02 10500 bytes
SHA-256: 410ae1690e4f17880edfd010920969e70a3db6462464806cd60ebe584d65c834
font_02_sfnt_off000142f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F8 18956 bytes
SHA-256: bd4bfba6a22549c1dcd6f58ff078fce4dde542e3f5e9779c25a1f57f71ba4db1

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