Malicious PDF — malware analysis report

Static analysis result for SHA-256 325de6f6ca333ac6…

MALICIOUS

PDF

94.8 KB Created: 2021-08-16 06:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: af2539bed1de540fb0e349f362798696 SHA-1: dad78e73d2e5735762636d6fea8621ac48e86145 SHA-256: 325de6f6ca333ac68e35b05c63fcb89dccfa577a99d6da040911913af00377eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware download sites. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=percy+jackson+the+lightning+thief+full+movie+123movies PDF link annotation
    • https://bda.ch/ckfinder/userfiles/files/gojimiwaragevexukesi.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160f4656f6c342---rojagiroxidofopusewapifi.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/nifegopufugalafuzovoresig.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/4d40c0e0d08839e1a2449e6edfbfab48/54596044694.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e44130561---vamoduxatafade.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6252af2e5---jigakusoxejejeman.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/3c5e38b574f39cfdd41c17dcd05f51f6/65054040239.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/zetifemekekopinedewupefa.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/zevuwivedalaxarulomotose.pdfIn PDF document text
    • http://ksboutlet.com/file/files/35229099388.pdfIn PDF document text
    • http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/kogaseto.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609beb7b245af---96739568641.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/bakitidanoxetujo.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gumitegebej.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/25189512878.pdfIn PDF document text
    • https://inks.bg/userfiles/file/1990478386.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075a12487191---8232521234.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/6f77942c37b80d52c31e33b0e1a49a50/fusigikofojaz.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/15474117156.pdfIn PDF document text
    • https://festacontinua.it/public/file/36050248077.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/72154559949.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/c75e2c5a5e40ab1904bdbf7162c7abba/teradurosexi.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0997236c5861091d707c318274c3ecff/54237552862.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/pofokopexope.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/megugamifalom.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///9602912280.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E3 11628 bytes
SHA-256: c93f263b75530233b3e0f994c2dc1750e2cd8fe5b4d7319d16409581a4a86fc9
font_02_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 18060 bytes
SHA-256: c871ff26b065aa5d1ff6dd6009ea4ec7a0222ef5bbad36d0eeb977d06bf9f90a
font_03_sfnt_off00015392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15392 16192 bytes
SHA-256: bfe64e3d917f904c536eed845c8da68738fad92952cf9e53c7c08a5e2fa48a2f