Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ae496c22f61985…

MALICIOUS

PDF

80.9 KB Created: 2021-09-13 00:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 604528957da15ae5df91b4c4c43aa212 SHA-1: d395d4aaac7adbf005add7183e9c0b07c843b110 SHA-256: 20ae496c22f6198570ddf6941acf120542dfa68cdbe4244a73a54a9c2221b977
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://tidaksusah.com/contents/files/87076711050.pdf In PDF document text
    • http://exdebt.bg/userfiles/file/bobelixisejolokugepufeg.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/69516943591.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/ratunufaxufunifoxim.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/boduxadaxegokut.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/78381481358.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/lapofu.pdfIn PDF document text
    • https://novsport.com/content/File/dutexiwafibufuwejupel.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///25176713546.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e2e9a4720---gefaxogefukasuk.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/voduretemajesejozosu.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/38338204635.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/78627636572.pdfIn PDF document text
    • https://pyccenter.com/images/Upload/file/57471287411.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/sopikiwisotupaveto.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3622fe8d1be2864d9313fa0866e49225/10951344926.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/98593522528.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/joduv.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613536efa044e---34519843558.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/55000476858.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/dedosisogi.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/cbf463fcfa868d07d19778b7316992e4/pafelujejuxusomereposu.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210906175128.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///28346038748.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/xovoxudujabudunar.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/1728292328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=excel+to+pdf+vbaPDF 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_off0000d46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 19224 bytes
SHA-256: 8738e83f0e09dbef18acd44779880f5ae74dc74452043ebb86ddb8907e52e619
font_01_sfnt_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED9 10440 bytes
SHA-256: 65abab729cd9bc0b9781e8f71015062e8166b6b542b1694ab34ee62d6846baf9

Open this report in the interactive analyzer, or submit your own file for analysis.