Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30823c30c36a742…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 02:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d89740897222712bbaab94b10db0915a SHA-1: 5bcbded20d45b6b3e59b3fec5f551afbef309608 SHA-256: d30823c30c36a74225aa05a60f008d05b5bd298bc969d0e00500b23e79c158a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://philabc.ru/uplcv?utm_term=cutnell+and+johnson+physics+10th+edition+answers
    • http://franzoesischebulldoggen.eu/userfiles/file/kogoferugajekeg.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e4234f60b25d692a77fbcd34137bae32/41476490217.pdf
    • http://findmecakes.com/userfiles/files/juwewipe.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a756e6dcd5b---kujam.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/59030654877.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081d193232ef---87194132480.pdf
    • http://ahxxzx.com/userfiles/202105/file/61856431412.pdf
    • http://ksnjl.com/userfiles/files/tonixeguvadopilolujif.pdf
    • https://laetitiabernard.fr/images/file/12163220923.pdf
    • http://pappteam.hu/userfiles/file/wazobeduzafi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855b187ae14---vixaved.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccba378787---82376514675.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d2535b8aa---kudejebitufo.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-5-31/20210531083109952486.pdf
    • http://www.urbanwaterways.info/files/24057846147.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ebcd502a1---zorijepop.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160986c9ee826f---nixirigovutew.pdf
    • http://nc-israel.ru/upload/files/tosofipareture.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17ae7219b---23879502237.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/d3o6b52ocvupv3aijqvu57eeo5/sujesopezetotu.pdf
    • http://aplus.to/userfiles/file/maxakurudokikoxosaf.pdf
    • http://halaljones.com/uploads/files/29130336147.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/138cc9740415db500db62f8919c540e2/xefajowisetupodabom.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5f2a7ab6763869725f82f45cb2912ec0/segubidabozeleboratalo.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb3da3ccc9---daxanifipotitesatil.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/5bae7f79ee3a60c0713987395d8f2bb6/latufalawaxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed62.bin
a31c950c7877a058a310af9bfe0f136414aba3dda2033b28e4a853699b6c2e93
pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 11248 bytes
font_01_sfnt_off000107cc.bin
331ac128e6e719654a9fc0ba67c6164850285d4d31f0550d1dab827ba9ef52b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CC 17600 bytes
font_02_sfnt_off0001361d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1361D 16792 bytes