Malicious PDF — malware analysis report

Static analysis result for SHA-256 034e2e5389130747…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 23:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 71e06fd7781e2a3aacd121c6fb9aa57e SHA-1: c4e38c3fca9eb06cfa430b64595f636f450f65d6 SHA-256: 034e2e538913074779b9f1d57df963ff61027afdef915e24b23a209c14e4ead6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript may be used to further obfuscate the malicious redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://hoangle.vn/uploads/userfiles/file/juvum.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/c9c7cc8bb2a8e472695b9edcfdf3b22b/9035907810.pdf
    • http://w3-japan.com/js/upload/files/56199261866.pdf
    • http://phannhan.vn/files/usersfiles/files/sizerinogovijubenum.pdf
    • http://elsekmont.eu/userfiles/file/50923620669.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/7bd9e18657b88790acb47d5f5066524c/21712079914.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a95084cf69d2d0b932e92a6b3968bb0e/68305002630.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/1dl9prbne9t6kfckkfthb2opub/zaxafusavimuvevijunexijiz.pdf
    • http://notarbrazda.cz/userfiles/file/7168269122.pdf
    • http://flirtproducties.nl/ckfinder/userfiles/files/jidegupug.pdf
    • http://architettosirocco.it/userfiles/files/baxanuziwoxigarelotirotan.pdf
    • http://massimomoroni.it/userfiles/files/78029885751.pdf
    • https://bettyloupaints.com/userfiles/files/lajadutusetakuwavokuloj.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/087efab74b2ab972e8a1e491e9e02ad4/42348334667.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608445ddd31d8---tojutenesosusopevazadus.pdf
    • http://lightningriskassessment.com/ci/userfiles/files/vilivakalepage.pdf
    • http://extracam.es/app/webroot/arxius/file/95638062685.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d61127a859---tinawi.pdf
    • http://bukharaalpharetta.com/sites/default/files/file/68514283749.pdf
    • https://tigaintan.com/contents//files/82116984815.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c972309a166---bikatitevejejalaselutafi.pdf
    • https://pergamine.com/ckfinder/userfiles/files/tivunixumafagoxawidos.pdf
    • http://szao-spb.ru/images/news/file/49955256419.pdf
    • https://aimhc.com/userfiles/file/pilumaziru.pdf
    • http://slstudio.it/userfiles/files/9637424646.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ome551+energy+conservation+and+management+notes+pdf
    • 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_off0000eb42.bin
a9dad11c15a0ea9133a6422a97dbdc564139771843d9e2e8661840b36ae8fd08
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 17108 bytes
font_01_sfnt_off0001177c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 16792 bytes
font_02_sfnt_off00012f93.bin
bb7e9aaa2f246df1e34985bfd5fdcdb27be19870dbf054d59158cb31101c4ef0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 11308 bytes