Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b410f30090a09f…

MALICIOUS

PDF

78.6 KB Created: 2021-08-25 06:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eec678f39e7a8a190f36d31df583a3a9 SHA-1: 2d73241c5a2a40be53076f214bbc72603b8b2c7a SHA-256: 46b410f30090a09f62fded60f5a3e67e64ab6d96e32f4881e6cbd7d03e2dafcf
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains a link farm pointing to multiple compromised WordPress upload directories and other domains, suggesting an attempt to distribute malicious content or conduct phishing. The PDF itself is generated by wkhtmltopdf and lacks readable document body content, but the embedded URLs are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/df15525e5374d4eee9c09a19ed3030d3/tigodefalemelutejamig.pdf In PDF document text
    • https://landbar.com/upload/files/gunafafaveboguwerovumo.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/80382521354.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/liborebemunixog.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/79861181498.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/nupafogez.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/85602426867.pdfIn PDF document text
    • http://acunambalaj.com/adenoto/upload/files/290500035.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/48288456115.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/57181949475.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210716232926_as1wju.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/wugakinikofe.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/emo1gug7oqocvb5djhgnvfhec2/kefebutarit.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/dowogonot.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/27ae61d21dbc6faf7c9373fc34cfe7f6/16472498684.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160781ed81a0c3---20522091728.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/mubuvifivilupojuf.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/6pvf6su4g2vuutjge9dmrm15ki/turenopifezewozapi.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16115f07e9254e---piwuzujixugoleluxunoxe.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/1b86c3dab757efe3165fa65cd26eb4f3/nolabemizeta.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/94446683042.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e88e78487---26189431940.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/5972288597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+cite+a+website+without+a+date+apaPDF 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_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 16284 bytes
SHA-256: 49a550bb09aaab6da0c574bb5eeb90e94959482a8b3ce5974242fecb30b620fe
font_01_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 10680 bytes
SHA-256: dddf1145707a7ce2b00dc9a90612cdb2da820ba47078ca6757ff6904b69b42c4

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