Malicious PDF — malware analysis report

Static analysis result for SHA-256 9121bca55108f67c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-10 23:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3afcead035a680d730eebb5a81da717c SHA-1: 6dbd09183ae3fdcf40e1bab4fe129747c8b31519 SHA-256: 9121bca55108f67c051c8477b9f7219d7ef97dd995a6797788865701b1418077
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, with one URL specifically mentioning 'minecraft free apk download latest', suggesting a lure for potentially unwanted or malicious software. The presence of multiple links to compromised or suspicious domains indicates an attempt to distribute or redirect users to malicious content.

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 https://vibingvibes.com/userfiles/files/viwifinoberupiwuriwexunig.pdf In PDF document text
    • http://maginsaatmetal.com/resimlerfiles/kerenoxipagojopakejulelir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391a14bd981---30929764986.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/bepakitiziko.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/dpvmn1j7tsj70odn3u355vjgk5/tozuw.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/zegozojutulerafasivamew.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109030345421893.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/98603764511.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/63587678883.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/26703244420.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/vumugugepiwegegi.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/9123857650.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/84489166603.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/80928496982.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/92364016607.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/wegoxuridubimirikojanu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d4cc522b9---53560126199.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-10/20210910225127714863.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613382fde2255---jovowuvikeligedakasev.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/36332752687.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/gilelen.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/deneturizasonuze.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b47d87fff8---fepapexogev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=minecraft+free+apk+download+latestPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/68691859840.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_off0000c5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BD 10784 bytes
SHA-256: d01b9515d945c60f35c70a019144a0db267329c1b9f3e64cd79dfa19aa4f32fa
font_01_sfnt_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 17768 bytes
SHA-256: 140e99d01241f96e2b7e1aa5707259e3ce51498ca15c300063426077f2884078
font_02_sfnt_off00010b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1