Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1998253c50423b…

MALICIOUS

PDF

80.0 KB Created: 2021-09-08 00:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2ce174d5654cfdf7afd45b66d5fddbbc SHA-1: 43b9a6963a75baadf2bc3fa6ff0cc4ae8d4191bd SHA-256: 3e1998253c50423bbfdfb4440c1c793f83019f995a1b3e62585eaf1c7d74e841
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that function as a link farm, directing users to various external websites. Heuristics indicate these links are often hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing attempt.

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 https://garglob.ru/uplcv?utm_term=adjectives+worksheet+for+1st+grade PDF link annotation
    • https://atcotourismtravel.com/userfiles/file/subotoretiwu.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25dfd561d3---risufinawulugoloka.pdfIn PDF document text
    • http://abpaluso.com/upload/file/66522179267.pdfIn PDF document text
    • https://alibabaoman.com/basefile/alibabaomancom/files/vafaximapujizubus.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/91338422426.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf77edc3ea---ruwafibexit.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758a1803b0d---jixetugomujoboborurodudu.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/21414557758.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/pejaributog.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/mobenadogur.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f69dcaa5bb5---tomijeramune.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/12980630168.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/pixukofomipiribanunef.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/55366611140.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/a175f88a8137253fd74654ba0e6ee34d/95535800170.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/15395090558.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/6fe38a45032c31dafae2768ec2069016/33859858892.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/kuvasu.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/btj1eddnjqq76iuv7ii4ggh2l2/49811637104.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/fipimirivugivo.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/pukenuliwoxaw.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a64477b35---69071865157.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/79807602409.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 16700 bytes
SHA-256: ef00d2488f60a2adee9cf20c23384d84b4573e9495adbb070678945cef246038
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 11012 bytes
SHA-256: f2e387fb2b76dd7bdb8de640121b020b054f201f8e3503f81baf2464b69354cc

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