Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c48cd73265dbd4…

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 18:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7801b02b540d708b6eca642279db99d0 SHA-1: 6eb94226f1f0387aff4dcab691ba7a357bcc9d82 SHA-256: 30c48cd73265dbd4261da8629133a6d1a9da4d66aa739c98b01edb43730a2ad8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant by ClamAV. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document's structure and embedded URLs indicate an attempt to lure victims to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://synerhu.ru/uplcv?utm_term=integrated+change+control+process+in+project+management PDF link annotation
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd82decff---vibopedilavivilus.pdfIn PDF document text
    • https://adikkedua.com/contents//files/nuluzomajixup.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/795472594.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/kapofupikutize.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/b9c9ee488a3a47612f889a98e02cbfd5/kovevizudirinojow.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/42966265186.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160770fdab41d1---befurofatomopujedelala.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/85a9640096073117966953fcb868bb48/zinupowonizomot.pdfIn PDF document text
    • https://hsse.cl/files/79029628686.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320f8bccc3---73785139713.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/lorerarubukelufun.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/jolujug.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/vufejolisovedo.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/7jt3qpq4vknvljgdh5a9h9va92/20523658376.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/vewukutetowefozefeso.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/9360557165.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210819235819.pdfIn PDF document text
    • http://hongpakthai.com/ckfinder/userfiles/files/kupegagazem.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/02bd47b556424cbbfbdf85494f6c6f1e/libubagemaraferenatilupi.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/21845587165.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a90bc357a---zururewanaxitedekir.pdfIn PDF document text
    • 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_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 16876 bytes
SHA-256: a66e184226b7b631cf1e8d3d750c7d408b7e8af3f7d52d7febfdf07af1be9b2d
font_02_sfnt_off00011ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA5 11040 bytes
SHA-256: 0b3b88f2e42254df5db7c0d007ffeed1d4be48333b77441c04a0926864fb0190

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