Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e87199f07d4dc99…

MALICIOUS

PDF

132.5 KB Created: 2021-06-27 00:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54b688bd17b85da9bc1b5e2e0d7153fb SHA-1: 7fe7454dbf309c3aa2c6053e66fa526021db2818 SHA-256: 7e87199f07d4dc993804b5059df711292cb95268cbddf6b950478874c2ffbafa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress installations and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the heuristic firings and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9869

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/4f7f91a5fef87012414455499772158d/lojalejelenubiwopiro.pdf
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/1095121491.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/7680d1ab14e8895e6e6dd1e4c9f1b9a7/xibududobeluxoxuto.pdf
    • http://ladyqueen.it/userfiles/files/26538178166.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lka2ubp16o15gu5ggsrefcrgk2/fefavitijakiwulale.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/bg9o90gsn74ima4ji2lqsm5m53/pebuvuvadidofib.pdf
    • https://cortemadera.com/wysiwygfiles/file/65685283879.pdf
    • http://beachfirebrands.com/userfiles/file/guwidorixopudamedo.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/2120854518efe8013b97d63c8152ef8b/jegubibegemu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a295c4f27ea---37752126934.pdf
    • https://bravo-hk.com/userfiles/file/76166353634.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c5bcac2a513451c27d7a0ac3c8a32076/dabaxuribisurexigolu.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/ce9283915c339b15b4f6a9bdeeb42cc3/tomasidil.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160767f201ca73---vanowejoxejoto.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aacaff94675---45170417398.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2703e3428f---lixipuxe.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/t6o13gg3skeaq1idjqlqdvjf97/65709250810.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/lcaomdt107829pu05dc8p6gvm2/26611841850.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774c0f02389---tolivuxedanotexude.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/98037eaee84e9c4b99dd3ce08a0e12e6/pezisalufobobefipadununaz.pdf
    • https://xanbiente.de/userfiles/file/zafavi.pdf
    • http://styropapex.pl/userfiles/file/nuweguter.pdf
    • http://chono.mn/uploads/userfiles/files/doruwodugog.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=our+lady+of+lourdes+grotto+baguio
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC40 16792 bytes
font_01_sfnt_off0001044e.bin
e64218238db901067d1e7af268c48050d526e005c85989bed8803782d001fd42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 71764 bytes
font_02_sfnt_off0001bde0.bin
7b3adad55cd17b7e56525706c6ed23d57a43138d92bad7828541771715b46085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDE0 17492 bytes
font_03_sfnt_off0001eb7b.bin
bca1682b78be7a5a888aaaeecb1b6cb4ec64427556d91a9c2973a254bd74aa48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB7B 10804 bytes

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