Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7ce206720678bb…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 14:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 40b9e267242ba7e50181ef7f9dc0585f SHA-1: c181bc49bad268bab8c60d1109bcf3dbf70a94f7 SHA-256: db7ce206720678bba65b99b23f236f246404e7bf8b837fd3c4e327897ca70c37
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's structure and URL patterns suggest it's designed to exploit search engine optimization and user trust by appearing as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fotofidelity.cz/userfiles/file/xujizexitevunul.pdf In PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47801401f5---97787257509.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c669d43e4fd---ketasenapixosej.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3b17988684cdd2863ad0646e252e8057/96723413575.pdfIn PDF document text
    • http://ruresept.ru/files/file/88413334360.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/13329897076.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/pisowubufetonifefarosumu.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/88131352966.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/lumokovupikiz.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9af1ebc8c4---rudonomidowivorefepagule.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/nusomi.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20217255815584.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b8b320bce0b3be00a93f7325e6117b62/93096311006.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/47923818852.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe7ef8b07f---kuzubidoz.pdfIn PDF document text
    • http://northcity.rs/slike/files/16376859901.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/ab6cea968c074ac8c5af93760b0fc7bd/38028906494.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/tikilejuwidojitevijo.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2subfq6eu14ml6n1gssklibs54/85895602202.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/nimeboruj.pdfIn PDF document text
    • http://ubest.ru/images/file/vibezi.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/a1f0d24f37a98005046e5e7dd72fc835/15141525699.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/22898420618.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/df9e830f447686e8f28a9bb9251d7916/26881715795.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=construction+project+management+templates+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://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_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 17768 bytes
SHA-256: 67cfe9b01009cca43a33e90e9a55cd2a58bea6c2479b96b03e3e08faf8afbae7
font_01_sfnt_off000117b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B3 11224 bytes
SHA-256: 7533d5faf5d1ee9eda81f40de034f649a42246ce6b5f351c9e7011f17b4eddec
font_02_sfnt_off000131cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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