Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb46f0aa2090b01…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 22:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ece58ce07f0f7d91a03a35c01fa10375 SHA-1: e9237b60e1f400fc6a99391d215cb7339c4d7ad5 SHA-256: deb46f0aa2090b013a4c1d953b118a892e35077f2816fe2178b7a18532ea13f8
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute further payloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/21ad9545fbdae42fd7c63cd5bc3c56ac/36714907197.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b2a7168d1---pujisuxibozizobupera.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086f7208a156---80025718818.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff4c2b19f---98066146354.pdf
    • http://pallenberg-busreisen.de/uploads/files/6624000920.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd4512e65---31194170777.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1468daa3be---siporo.pdf
    • http://bannhuaduong.net/upload/files/poviwejuwowepefepuboxatu.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/donim.pdf
    • http://capmar.eu/userfiles/file/razafenenu.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/523bc0a805f13bc3b44b775240718b8a/risun.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d25fab0aae---bilutududadajidores.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074926b49c9a---jazabanaburi.pdf
    • https://ski-experience-japan.com/images/blog//file/benek.pdf
    • http://wienbildarchiv.com/upload_files/files/wufefibikeviko.pdf
    • http://centrons.com/uploaded/file/50192293060bec58d6d1fb.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/a99b0c75c11bf166a1958037ac6c2d5c/mopabawifeg.pdf
    • http://samurairamenbar.com/uploads/files/sebotolituvanapuso.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607573932f60a---62311270608.pdf
    • http://voijin.com/userfiles/files/21852354655.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fa4c7eab5---92475594170.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac0487d4c0---77501631824.pdf
    • http://bindashnews.com/userfiles/file/gogubebevijizo.pdf
    • http://creatinglifeoptions.com/userfiles/files/vadabujekobimagubudi.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/68489762617.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=words+to+describe+emotions
    • 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_off0000efe9.bin
aef19e1842051808fbe76f48befa08fa4b7e44da90a4014f2090467e004d5b93
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 10456 bytes
font_01_sfnt_off0001079e.bin
48a188dbed982d5656f55a7f25f1cc071955ff18112e60fe131b2522d5f8ee76
pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 16900 bytes
font_02_sfnt_off00013381.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13381 16792 bytes