Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b8d38fed02f2d7…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 09:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0301382ad18e50797c0460dec2e2fea9 SHA-1: 6349e97110e46b61949f8157f93f4325dca0bec7 SHA-256: 02b8d38fed02f2d7817a616414652f9d64f2a55b7383894d0c31cbabb74091ac
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious PDF files hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c35f2f84a62134805bc6c7161992b18b/47793388558.pdf In PDF document text
    • http://zap-interactive.com/uploads/files/tunosananiwutanilunuw.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/87300756285.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/pumutemonupuvegugaxudilug.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a169f37bcb---damuxurirup.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/kusimivutijif.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/98649901904.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc6ea7816---jojefiv.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/688d3d9dc59e861f5341d3ec85f6bbb8/zukisixebak.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/fa1e439e5ba0ba0d2a01f91a8daee026/mikuzefopinikat.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/b8n451c9tkja2edki8id6gv2ks/nipepumifibitubi.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/sokopovabawuzu.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a896869d4f8---baxokezupukikemeraxinefur.pdfIn PDF document text
    • http://93564497.com/userfiles/84705517968.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cp1n8jagdmktsm293l3sthqkns/mupir.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/cbdea3cafd930688f6a8409b1cec2238/mujawabobisofikotagaw.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///vemimixusiwuwipimar.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2583464195---doluruzo.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/zulasagovusexuz.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/odvi0rjau13313oft2t4hgkt56/bipenolaxipugak.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/junefexesoridubawar.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847bc094c47---zifonoxikusegopowijafikis.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/28259666725.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/tutujedalowemolo.pdfIn PDF document text
    • https://nadamasristorante.it/file/60298883173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+prepare+for+team+lead+interviewPDF 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_off0000ed2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2F 16884 bytes
SHA-256: ed7da8dcf1387a8434ed65d33a5a44e021047d83fcc1b04055cb60b3905f0538
font_01_sfnt_off000118d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EA 10632 bytes
SHA-256: 4fbe0060757cd78787f658a34948f4f4ed805dfc70633b487bd5d7784f394e25