Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e70235cd07dded…

MALICIOUS

PDF

88.4 KB Created: 2021-09-16 04:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0c6ee7687fd2bb7c4fd1848662f85ef7 SHA-1: 38fee7d019bfb301e5d454f36742a49970e6d6b5 SHA-256: 05e70235cd07dded2421050c587009af55d6006f1f7d0ed1c9435381a830f3de
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/i6n3pp14ucbh6v28j0h2geco0d/32066619490.pdf In PDF document text
    • https://dienhoanghean.com/upload/ck/files/rivevevepudasameg.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/78965178304.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/3532089595.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/38103890160.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/51292389256.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210907_232038.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210904115822.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/29id1t5ljgj2tab2q258dqgj31/15004044836.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/liluniwixego.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/bemonogozatuzak.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/jezavak.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/57073649313.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/lolowusowanakojubotitesiz.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210908_185206.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424f19c97ba---65656676192.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/33841174983.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/45622641231.pdfIn PDF document text
    • http://belean.pl/userfiles/file/saxosujoxuzupadode.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/32281271897.pdfIn PDF document text
    • http://vinmexindia.com/uploads/52504804743.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/fikexa.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/28752400822.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/vamuvuxoxofubiwigub.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/40391379973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=football+manager+2020+mobile+crackPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD462 16352 bytes
SHA-256: 002206b88d26d4e98ed024f396d06a4995f1ea64dec2f3c06384c384b5bb893b
font_01_sfnt_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 10856 bytes
SHA-256: c0b2c6a41df07cf6a682085e0c3a47f9dda0633754ca2c8fc04e722c813a85bd
font_02_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 20944 bytes
SHA-256: ccf49afaf6ad4d4742501d437014e3a840a0163297a87cbefec939992d912310
font_03_sfnt_off00013ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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