Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9e696f77cdfcbf…

MALICIOUS

PDF

85.0 KB Created: 2021-07-29 20:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 74b29107020ab9a4aae3c17607c75db2 SHA-1: 794e82bee8136c7c5b0c7f171ee5b665d1103332 SHA-256: 4b9e696f77cdfcbf82b7630bda6e4661ed88b7960d61f427e5f74240f85ff040
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, a common tactic for distributing phishing lures or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links are designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/9c37669d4b6fa1c0102dbda5015688ba/mesivatorewefilamife.pdf In PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/gorobuxiropanit.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/93760880928.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/5681749824.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/fulodotalasubiti.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085277072949---6015219337.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/letalixudoxesimeriwod.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/mabagivovito.pdfIn PDF document text
    • http://polletnv.be/uploads/files/45619118153.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/95cl3lj9tbocv32fju851o8k8u/mopolo.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e56f36f8---56359468945.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/mumazijinib.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/n422kcheape2a1apic0nvr5216/3673283068.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9ef8a92b05ed218302ddbdc7ed46139e/82248497335.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fd22572a8---mesudujakegilonusagesano.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/zivokajifabimawaduwo.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6fa36f31a6d11f3230d0657779a19e2c/43433557808.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/zawit.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/vb4ktso6i8sgbtghe68dd4di12/zimikezulidakewefitoxe.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a9485b02fb38c00dfb515c530f7e5563/lavedamusobarisivabedup.pdfIn PDF document text
    • http://charivne.info/images/file/subufevukiluwemeverex.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/nexivununinawafakuwulor.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/dinubimis.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/mufizofi.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/31067651205.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+program+a+genie+intellig+1000PDF 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_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 17312 bytes
SHA-256: ff20a236beba936d9f6912d176d2bae93b1578fba24e78f13a2bea2213348845
font_02_sfnt_off00012be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE9 10676 bytes
SHA-256: 20adc4ffd5212277d55495aa925240b7c7d9c8d9c53bf13f2f9065444d73df62