Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22e6e9a0fd060ef…

MALICIOUS

PDF

82.4 KB Created: 2021-09-09 02:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 00701de3750561edeb892a2effcb5767 SHA-1: 8130089e6424bbc326b049ccc7e7e2979f5a44be SHA-256: b22e6e9a0fd060ef7ca5fe1adeb6888146446ffb6e3457822daad5c93efbc678
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall detection pattern indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://perles-del-beya.com/userfiles/file/10354479282.pdf In PDF document text
    • https://classoft.ro/userfiles/file/27737740277.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/30568485912.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/fulubilusefetaxa.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210907234309.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/getixegufufujebe.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/fuxuxi.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/196db64a9f4dbdcc395c8a3612f08832/disurilewivalo.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613791d09f6d1---vositakakewebuxujegifiko.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/xuzubokiwurajomabufazim.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16133958e25e5d---72076197130.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/xekobojarobejigeju.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/geveri.pdfIn PDF document text
    • https://greenways.at/userfiles/file/60850287279.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/marirovusifofazada.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/72572346456.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/fojewepapaborerudadipulun.pdfIn PDF document text
    • http://potya.com/66628537334.pdfIn PDF document text
    • http://nincity.de/inline/file/64323813315.pdfIn PDF document text
    • https://eksiliotomotiv.com/upload/ckfinder/files/nubugekira.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/zedovorob.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/ligazaz.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613937680ed85---66655540408.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/74618739685.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161386e4a16385---28168505437.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6c77ea77d4846d7edbe0470489db512d/beriborikizolotefenutivuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=power+rangers+beast+morphers+online+freePDF 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_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 17976 bytes
SHA-256: 6b0f9273a410d7e5dc58cb99e072be7d936369d0fde5fc3dc93e2b23c8a56f64
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 11032 bytes
SHA-256: 771e85bd92b5fa92c541dd8d303e7f77025fafee36728290a9be148d368a5bbc