Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b42fa93a8e93ef…

MALICIOUS

PDF

89.8 KB Created: 2021-07-16 15:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a00070620486a6fbbfff5fad1d470ec0 SHA-1: 4b9dd6cadc33bee6a99d541884ab670cfa7f3bf8 SHA-256: f5b42fa93a8e93ef2dae2aecbf04598dbc16c79946a39ea13e0e8e06b59357db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an intent to redirect users to potentially malicious sites, possibly for credential harvesting or malware distribution.

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 http://perfekttorun.pl/pliki/nobatorabibujaxeki.pdf In PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/pc0i8cl8p272gf7jtv28om1fod/32363705248.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8523298fa---dakakemomubekexov.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e781d7eb28f---mitekamekef.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a097641ee3f---wokoxabatenawixezefi.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/9073046261.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/7287139741.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/kic97e6u2j2gk3mp39lv8ei9hh/detut.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/77182733382.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/09d322d713f82c702154b0533479b966/xeguduwukuwife.pdfIn PDF document text
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/kuwer.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/wuketetamidukuw.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210607_175049.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/28024789215.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f2a4f9fb---62886295919.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/jepigitut.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e92d87fa7---20550432210.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/87564475096.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/s0h0b3q18p11j64uie5j5if6n0/zijakakabifujanu.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84f72eaa68---27398077531.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210617181055_hiscia.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/13632682211.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/lurav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=grep+list+from+filePDF 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_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11239 10292 bytes
SHA-256: 36986ce4936070648222bb19a935fc84c6c062a39897320fedf83a975c35c8d3
font_02_sfnt_off00012969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 18276 bytes
SHA-256: 80ec45ac71edc6a4791f1e4796c46e54b41e8f0b7bd5a6b90ecff767e627d40b

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