Malicious PDF — malware analysis report

Static analysis result for SHA-256 982f159e4defd81d…

MALICIOUS

PDF

94.5 KB Created: 2021-06-27 22:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5f637f94870359e81eb6b109ba38ef54 SHA-1: dea1d68e9ec24bc517ee68540027aef81d8404f9 SHA-256: 982f159e4defd81df6f46543bf29dfe2dec1d7e293be0a6f8fe0d7815a054588
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URLs and the nature of the hosting suggest an attempt to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://dm288.com/slicice/file/96037372633.pdf In PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/7b615737e9450264e265362158dd5bb9/fomuvozobolip.pdfIn PDF document text
    • http://iphysiology.ru/upload/87402011661.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/dijitevugenusekusizoduw.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/tn1nd92j0viala3mo7o2quos8j/72995562197.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/siguxapi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/cfq1cjm6a2vlg2sehif13eime1/fogekemolajunugedaseberut.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b52e0fd8003a2058b8f363116ea8c1ef/sexuxabixogobum.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/tupawerivilejetune.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/fevdhggdif2dltd06sv3osiir4/54881548144.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/bowiseberokozujolis.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/toxisogodekufebutem.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160819098a0a86---jatavikujogu.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/wapezupamogogukuxubujuzo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/v7g3c8gstrci9toqen290h0ir7/tonodufinotup.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/80528207542.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210514/file/16209675108495.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/guxokifawirasekixinuz.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d73733b57---29801322581.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/58565107810.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080660580424---80148492227.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/d68e9254cd2f5bb7ed02c33b479db355/linakulixu.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c74bbef82518a97f5f73816aaa8f280/nojisorupifaxejojomiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=computer+science+book+for+css+in+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_off00010b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B97 10936 bytes
SHA-256: 0fee4722373c271b4a3b130e3c6b8826cd339b6a337e1bba5ebefcea2776bf30
font_01_sfnt_off000124bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BC 18200 bytes
SHA-256: ee03ade071dd8bacf061fbe5aac08c3e03036213ac01a7459980da97ffef2300
font_02_sfnt_off000154c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.