Malicious PDF — malware analysis report

Static analysis result for SHA-256 367fd4745e3abcb8…

MALICIOUS

PDF

89.9 KB Created: 2021-07-30 00:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61ff20404ef0911c9d18cf9c040aa108 SHA-1: df4b35bcbffa567f2186178c5b7c20cad41c2282 SHA-256: 367fd4745e3abcb80aedf706a15ca48c69eea3a68d731c06ba84cfbb7035bb05
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160798201d9e52---laraboxavobawasajef.pdf
    • http://alnadaoil.com/userfiles/file/kejuzes.pdf
    • http://lnaixi.com/userfiles/file/20210622161923_1618173278.pdf
    • http://ya-ke.cn/admin/upload/71293083271.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/m2qgfpke9mn19snv190qseo061/sunobolatebiveselanidexol.pdf
    • https://ihotel2b.com/upfiles/editor/files/xuvidukawumov.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4427a4758d---27751240528.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794602d1839---sebipudomi.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/494920da21dbcbe16626a2dba5282ab1/zakejiradi.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088db4c40a21---34467280767.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/odrrm86l6r8mlk3kajmscpil5p/tagupomot.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/nixesawoviru.pdf
    • http://ampletrekking.com/userfiles/file/24924692216.pdf
    • https://bepcongnghiepphuchung.vn/userfiles/file/74757685987.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/ce2de5fb77a44743776f1dbb0a1e9197/93563485892.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c9e25fee53869a90355040fdc65de95d/30435459146.pdf
    • http://hydrogears.com/survey/userfiles/files/65702858049.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/40d3c687030ff128c85440f079f005b8/zarivovida.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/c0dab581b7bdb0420865e2634cb163cc/1647250230.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jmfi7kl6i5eqsplgjnpensqav4/gugobisitoveguxulezu.pdf
    • https://trotusgrup.ro/ckfinder/userfiles/files/wutamix.pdf
    • http://fotossc.pl/_files/file/88277212620.pdf
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/79674924947.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pnc+bank+wire+transfer+instructions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc3d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3D 16792 bytes
font_01_sfnt_off00011454.bin
7fb77f368c6646887db8c110a8e60809bad3053d55f0f2d08d612a2948b2b508
pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 10700 bytes
font_02_sfnt_off00012d2b.bin
811cd351b2c5fd960d752b76e49317f7ab9999a592883879fab097d9c1b422f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2B 17228 bytes