Malicious PDF — malware analysis report

Static analysis result for SHA-256 d827c0a8bf6be5fb…

MALICIOUS

PDF

77.0 KB Created: 2021-09-04 20:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 848b5b81d4cbe784606330596e7f7f71 SHA-1: be70dfcf2f44ddce23558d9e4f06bafcb30a5383 SHA-256: d827c0a8bf6be5fb7509a15c3ec784822ec9520da56f00b545e65ae638f348db
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous unknown URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/o3r63l39mmjs19u757kgucmn0k/lifopik.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0a15daef3---39186810218.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/goxufovegevoxe.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2d16fd53adbe8cf81b79a038708547b8/topugibozujixepidunozagaj.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/2915ba5d6e83417d75f6128a2b47982c/70461276011.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/86311894894.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/basoganiwagupow.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/wetegube.pdfIn PDF document text
    • https://kueapem.com/contents//files/73243902713.pdfIn PDF document text
    • http://gibisch.biz/files/files/teditalod.pdfIn PDF document text
    • http://ailizia.com/userfiles/76650074979.pdfIn PDF document text
    • https://mvservice.it/file/xemunenulupo.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/mesuripuri.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/2779293555.pdfIn PDF document text
    • http://dsfly.com/uploads/files/pufilatepovavamopitupula.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c853139577---75871441358.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/57928541035.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/gataxipukena.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/68518032495.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cd107f3a65---debetowaru.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a4db7c6e46214b6d9cc0285d42e1aea6/53757594196.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca05a237e1---lazetirakenakef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=presonus+eris+e8+manualPDF link annotation
    • 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_off0000c6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BD 18532 bytes
SHA-256: 8da31feb88be096e4496d9ebe721febfcd3140f59a64d41155ef1c82e9cc1716
font_01_sfnt_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E56 10480 bytes
SHA-256: be90d5e2a791476b5edc5dbc3fe861c5a0ec0bc2b7aad00b04cc1c50dd3da0c7

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