Malicious PDF — malware analysis report

Static analysis result for SHA-256 80122adbb3012baa…

MALICIOUS

PDF

73.7 KB Created: 2021-09-26 03:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b6f6e6f9d1332bdba11381ec6a5224e SHA-1: 2c4022f4646ba8f14fc6ba54ded41fc54e92b842 SHA-256: 80122adbb3012baaf4574bc39681bb1d0a168394e142f195908e007276dea1a8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to numerous external websites, some hosted on compromised CMS uploads. The presence of multiple unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://bladensburg.abwingsmd.com/uploads/files/51769780271.pdf In PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/955b4874579e454942594126c6beca77/nelawinopatobuputuk.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109190630162728.pdfIn PDF document text
    • http://showdoimovel.com/files/files/dewifevusurarero.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc8f3910a5---pevimexuwanu.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/musexadetuvanafo.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/f8m14ke3eqr3t748lrispie2nq/84430228810.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/naxapelabawibomop.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/1875194269.pdfIn PDF document text
    • http://cloverdiamond.com/file/jujef.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/lisiwezonudilufifagomofeg.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/tupij.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/ninizasapadofoguzonuvono.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/pisuwedirupiwizep.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/ponafinezaxokoputirid.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/9381114858.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/kobukizor.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/xodewovomefukujorutapenam.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/87218821384.pdfIn PDF document text
    • http://hjhchem.com/upload/files/zenefoburanoposibap.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/35004368324.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///gukulamasura.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/popedatonisefajes.pdfIn PDF document text
    • https://classoft.ro/userfiles/file/46009494528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=criminology+3rd+edition+frank+schmalleger+pdfPDF 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_off0000b746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF58 17928 bytes
SHA-256: a608d2615da847d93b06c1c4e81226d30065e37ddbd62a3d93bb2198fa5c247d
font_02_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 11476 bytes
SHA-256: 133fa2b925a6371ce146412227c300e968cd76a8ed08c132a9cc9bf6689c21e4