Malicious PDF — malware analysis report

Static analysis result for SHA-256 784ee82d5b99fcf1…

MALICIOUS

PDF

98.9 KB Created: 2021-06-29 23:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7e2f8e47c7eff6bd420a00c058dd62c9 SHA-1: 403433f69775ce8aeac3923953fc9fc55d320c52 SHA-256: 784ee82d5b99fcf11d9e40ad8e889e4cce11c5a3f9f13c6504dec1c6bc980f4c
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 sites, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of a URL with a 'utm_term' parameter suggests a targeted campaign aiming to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://irlanc.ru/uplcv?utm_term=tickets+to+my+downfall+release+date PDF link annotation
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a521e3a1a3---lamukuzokugosiku.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/77637545553.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o2brd7qiiukco7hog90c72lghm/wisukifabazo.pdfIn PDF document text
    • http://slsnn.ru/content/file/tolewuxir.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608296f5ced72---12454495028.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a597aaa78836e3c55034215d033f20f0/66496593256.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///46587989971.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/gafademalowur.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9627f7c07c---92641039729.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/mexipuvanikozeguzulu.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/pexitozedina.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a51fdea9ae---41794091978.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/46172461358.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/79320648465.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/10867494899.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b6b5306b54a0a5946f62604d73463dd1/kivamewexajuxozojifozaliz.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/11565472473.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/12310303924.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/de7039971fe986a20765434f06ecb3c8/mipitaripijofodajifuzagov.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/cb1866e653543c83dae48508a5571d8d/tixurodumuxonujo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba93ce8e4f---32645062255.pdfIn PDF document text
    • http://mospolytech.ru/storage//files/pebuzopifuzanutonariral.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/14476520676.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_off000117a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A0 20204 bytes
SHA-256: 23c9ef814baf59a269021a4bf89062bad7f53b01897ccb60bf4caea357f428e4
font_01_sfnt_off00014b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16378 10892 bytes
SHA-256: b10b380eceb063e2b4d896c650325a28060d1b5e41579d8a372e681f2365fce6