Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38904d87cd58ff0…

MALICIOUS

PDF

88.6 KB Created: 2021-08-12 09:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bb305405da63062e9f22c7c70e85e919 SHA-1: 72b8d757320d7786266809142e52ad912be27c7c SHA-256: d38904d87cd58ff0108033652e485e1954150341bc4259f5a9ade68e232ed96f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to lure users to download potentially malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976978c5b76---53360578578.pdf In PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/newoxikuzimogoruzakupid.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210522/file/16216214456048.pdfIn PDF document text
    • http://envigest.cz/upload/file/99000896483.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/nunulavilomegikajeti.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2108051714108147692k75rgial13r.pdfIn PDF document text
    • http://dhf-china.com/d/files/kemezonev.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160795223320f7---varonuleropizufovetu.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/vodozewobititatolekewep.pdfIn PDF document text
    • https://506hlapeta.com/files/file/zenegelu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/9854507047.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ca67cfd4112a0f779b8961784fd6dec3/retejo.pdfIn PDF document text
    • https://avela.md/userfiles/file/zifuxeper.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/2484c7fc60f850ea60a7353ea7c25ce8/84059229415.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/30408925052.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ed2acf1a7d0ce3daade5236a306ae493/lalug.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/80764637115.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/dawemizukamukige.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/figigabu.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/72646743869.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/dujezuvexojizotilineke.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/rr2o1gan4qghenvkjg8707ls2h/zanikox.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a22aa94f8---63085482739.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/mitanolixopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mx+player+pro+lite+apk+downloadPDF 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_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10604 bytes
SHA-256: 7a810f3023b0f66a74b4a3a92921d2d95210d4e52ae97e8767900c93a2101777
font_01_sfnt_off00010c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C78 17700 bytes
SHA-256: 3f17a72f635afb0a2031cd16cdc99d998b17ee72814a798bb006e6cc9684cc7b
font_02_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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