Malicious PDF — malware analysis report

Static analysis result for SHA-256 5601dbfabac60c0a…

MALICIOUS

PDF

96.6 KB Created: 2021-08-05 10:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bd9dd44ac010af5896cd76a8662f7790 SHA-1: ada3535c036d2362e696250912834e497b3959a1 SHA-256: 5601dbfabac60c0a1d666bd3295ff15afd6d7516bd75f62f47adccd20eb3b10f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the heuristic firings and URL analysis confirm its function as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wastran.ru/uplcv?utm_term=corrig%C3%A9+bts+sio+2015+%C3%A9co+droit PDF link annotation
    • https://amadesafar.ir/basefile/amadesafarir/files/nitobepa.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b6d17fac2fcf06bcfc790cab68094ab8/51937899538.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/5f920e025f090a4384d81187ceae3d04/pimabegagojuwanoriwi.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/84662426211.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaa507aee6---bokopejotiloxedubivo.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b655fc5d441---galewikopegowupifanutar.pdfIn PDF document text
    • http://c-six.it/userfiles/files/kitalanafapevasafoxom.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608010d001896---tafatimuxorimadefepigavu.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/f7d699e62385b97ac5994c98b7d41083/gowiguwimefonezelora.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/31120093796.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/m5i36pnmnrfqj6leac9svcpquv/81529119738.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/37431198563.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700e1fea7cd---28861990145.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4df7098c17---sotoruse.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/kvoq41d4o7l3ri6grc0bamqvr3/fopegajasusaninogopaponum.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/65770859847.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/56061524369.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/43155518735.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/38085920871.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11bdd832ee---gezonitupukeluwibixofa.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/59568007111.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/85577505213.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_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 16236 bytes
SHA-256: 9f9c9255c0426c77c5b13ef22f4242f4f7095bfd8ba808a20cf1712cd58ffb40
font_01_sfnt_off00011301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 10852 bytes
SHA-256: cfe524ac2a87b1aa606b875dc29046414aafde11ce93dc09049517a32353f34d
font_02_sfnt_off00012c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 18640 bytes
SHA-256: 49742e1d217fa1802f4949b6da82ea345c1a4a5d9c96c6fa11c432a333b23bee
font_03_sfnt_off00015a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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