Malicious PDF — malware analysis report

Static analysis result for SHA-256 049e846179ca903a…

MALICIOUS

PDF

95.4 KB Created: 2021-07-02 20:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fc61d531accbd927fa59ecb7081ae57 SHA-1: 90fdbf42ce645972e066dbd7d55e28327be2d605 SHA-256: 049e846179ca903a871f484a5a9dca6ac7fa82cd97d5a4f7eb8e78e961d73cc4
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of multiple compromised CMS upload links suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/j5kteke9uard4vao998faotsqu/41001342348.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/u1m37m8vho5046hv0uackej3pk/15056079985.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160977941b06a7---xojuzazogexafutuj.pdf
    • http://dalnoboy.org/data/filestorage/upload/files/besubu.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/c95cda5af80fca3b94909132caa08983/fezamizekuvurip.pdf
    • http://retco.ge/ckfinder/userfiles/files/gigugupovaj.pdf
    • https://canevastoilestjean.com/upload/editor/file/bexewuxalolixitibudirazid.pdf
    • http://banhangcongnghe.com/upload/FCK/file/80820342415.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/a2b342260a6f08d920cd308cf1b08136/valegupujilugive.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c6d4a5ecb117dab8422ce17bb379402f/degafuzomoguriweresenude.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a289ecbcdd4beebe94541c5e878dd181/garozabat.pdf
    • https://emauto.lv/index/images/up/file/57225846430.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/324dfff61cde0c52bc492ec3ea7312d5/zokilifiwex.pdf
    • https://flardochform.se/userfiles/file/jumuwobiweledo.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbb011f9eb---42475974344.pdf
    • http://sobsai.com/ckfinder/userfiles/files/xitamegabedinuviw.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/461cf1175ac8fe5fb5ece4f13ace5c0a/dotekeloboxomimurupozumab.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/576e126515796a7ac8e1711aa48f44d5/berazozodokoxesavo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c061871da---54345076050.pdf
    • http://abwcoliseum.com/uploads/files/78169202755.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+are+your+learning+strengths
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x110E3 16792 bytes
font_01_sfnt_off000128f5.bin
2e637387f1a819755f7e7ba379226654c8e53286f019c2ccf52853897eb65b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 17476 bytes
font_02_sfnt_off0001568b.bin
4c12b5f722f11cf724d3ff39448eadb0675075b10508e17c8ad5fdfd7371ae69
pdf-font-stream PDF embedded font (sfnt) at offset 0x1568B 10596 bytes