Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1989da78c8eef8e…

MALICIOUS

PDF

92.0 KB Created: 2021-09-21 13:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e0f149414ba086ae101c2cd0772d01b2 SHA-1: 4993412853c6c359abb85e28fe6e78065fe1d3b7 SHA-256: a1989da78c8eef8eefdd2a781c522fac1dae2ee6279390929bf2b3549d968eaa
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://moneymaker-gold.de/files/livivegene.pdf In PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/8f7a4933f458e4021513f72f8677216e/28284290420.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/rugunisitof.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/xavuvab.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/99442334144.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/tedubabuwazifemigor.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/76517503855.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339f5f1007a---katerupifoletolur.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/32071392600.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/tqpefq5c1t9orbl3mdbu8uojf1/56503046899.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/72237841961.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0de67d0f72c301f5ec1bab18d67367e7/13681423641.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/ledapogi.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/u4utp5a0fja8s91a0onou4447f/ravuweposipopetozir.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/foranezesevejetizotage.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/31416547501.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/ratifexenegu.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/pedemewurewavamoma.pdfIn PDF document text
    • http://freestyler.cz/img/file/98693411296.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/mulurire.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/39369404514.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/lugemovowaximuvadav.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/wexilinuku.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2f907d907---derewuxuwovijulamupuwi.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/bonugav.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/dewuzemezedurova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=nejlep%C5%A1%C3%AD+offline+navigace+pro+android+zdarmaPDF 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_off0000e5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BC 16336 bytes
SHA-256: adf38969d40f501586e0caf93d33991e243baeeecfe575c4831cdbf64b7044fa
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 11184 bytes
SHA-256: a47189d17369ede635cd47aedb9870927afa9a76d3039d93e501b4c6eb6b0bdc
font_02_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBF 20200 bytes
SHA-256: 7f729855e128d666a78928d989a67ea493263b7c87938ac89b86112e506f4b4d