Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff272a7e3fdce61…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 00:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0255e84963d247f6af4040d1706d3384 SHA-1: 0df713a59dac1d476270ddd139c0f03b39f9627b SHA-256: 3ff272a7e3fdce61ae253adffe76f8af639e82c053b2793025831e788890bf42
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan. It contains numerous embedded links, many pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300c05b4b42---powilosoxaw.pdf In PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083446ca222e---xipiliwimosajuzivejagaful.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/89370264907.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/26378530187.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/35a1721b9161d90995b1e4e63e83e608/wavukilir.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099966639955---ribusudeda.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c94b1e26b5---14526038684.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae49081bdad---didatikitawupe.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4002796d4---53049466437.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/64561507972.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/xirugowawagivotetusi.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/61782492384.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/0hqknqs4l1d57ji4bh0u95cvr0/17978867682.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/40tk0reghlj1grd6ivh43fekh1/takebaxobasoginilagi.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071627e7f816---21241836791.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/22805382726.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/97195572250.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/zejexufipedo.pdfIn macro / runtime command snippet
    • http://latexindia.com/userfiles/file/xibobu.pdfIn macro / runtime command snippet
    • http://teplospectr.ru/images/files/86462882386.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/judadeludotubixidumuli.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/f5371c578c268f3c310e9ba79a8bd1e3/67865811087.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/53828922117.pdfIn PDF document text
    • http://mstreatmentadvanIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=tipe+kandang+sapi+potong+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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 17884 bytes
SHA-256: c7b56f9837317dab319a8626fa9b48d4cabce49e0bba97339a558848255b435e
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB4 10580 bytes
SHA-256: f507b70b7bd20a9ddf43d54513c868ddfd638cef63b3303c2c3630ef579dde9d

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