Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de8b27b19fa5a56…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 13:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 066d0b5958c767e49a87580b1a00e1b7 SHA-1: 982b13a231983a7417fe1af4c8db171817decd9a SHA-256: 5de8b27b19fa5a568043d3447e1723672747da579d3e37b7db1292ba8949be43
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of link farms on compromised CMS uploads suggests an attempt to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9d68d1gjq9iccos98lbis65050/jokikogegomomitamumotod.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/7hvg57140a7hrj300bf0rlv3m5/newolobimefol.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/8613982352.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160879d3544c74---86172951092.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/sozepige.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/pizonapipe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc05d2a57b---pejebiseveraginonu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/dd8f3727fd9eb37712be73be48a75d52/64954089264.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16094d58ab76c6---87256846735.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/4f8b8868661eab158919ef5b9ea7ed40/jaxuxazuruzusize.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/23413167896.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/paparodi.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0jle0k7qtf4p36cqem07mhofbb/fesamigeganatikonuram.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/8e6fff4a3c973f80e0e84ec3c530131c/komenanizujisab.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/298755bfa9eaa5a35ea60b5e3a9378a5/51208732128.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/76989695001.pdfIn PDF document text
    • https://cian.hr/userfiles/file/vunefuxifuz.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/f478c0e41f5eda9115cce2bd9bfbe37b/20317253241.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/zosekaxapukukoge.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/fekumirikuwalusurobe.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a563bcffc---pabufopasad.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/17356733858.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3e6e01464fe98a1799cb10f3733b6d72/6506718808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=pdf+psychopathology+of+everyday+lifePDF 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_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 18680 bytes
SHA-256: b898ec3b3cb8082efcb06162bdf1b5b79710bc8395738a47490e5b5025b168c6
font_01_sfnt_off0001095a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 10976 bytes
SHA-256: debb567b0c62e537422a0dd51353fb85ce47b7746b527e44969fbe1b55cf5c3b

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