Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4f9e2ff867c6c3…

MALICIOUS

PDF

521.0 KB Created: 2021-08-20 02:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6371ee586abbf8ba944bd6e0565a4c91 SHA-1: dc4da07d9a863a9870ef8450b2ebe24834e48e9b SHA-256: 0a4f9e2ff867c6c3ac1641ff0202e542e51685baff69cecfd895aaa74ff1bddd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The presence of JavaScript indicates an intent to execute code, likely to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7559

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/70053926574.pdf In PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/44062300967.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/62669177692.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/43533539499.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/97902802331.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a698fc6404c---moroxifibebu.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/62798915762.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/matubujotoluzivibesewimil.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b885d45f71075acdc95e83a89069edf7/wuxanuwamuradotevanebun.pdfIn PDF document text
    • https://le-luc-braslou.fr/images/file/navasal.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4b22aafa4---50418618412.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ef20ac520dfa0cac9006732edf8d72fe/vimefejukupazazagupikugo.pdfIn PDF document text
    • http://haai.org/upload/file/pujobemen.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/nizage.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f3edd07dc94785a391cbe5a4a9519c4d/48518002606.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/tuwikunorofaliroxag.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/zabavakukosud.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/vijuteloxeruzekovuravifan.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/9138727236.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/34071922092.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/2292274805.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/15604532221.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/nanafiberosatilurolaz.pdfIn PDF document text
    • http://richardsonfamilyreunion.net/clients/7/79/79e100fddb184f5a3447a495e7c481fb/File/70761345050.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/1ef45387d32c21949015d9ebbebd0af8/sorofenomomog.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/6f04a6423947d7ef4c00fb4b9b699f9a/guliru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=interactive+student+notebook+toward+independence+answer+key+section+4PDF 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_off0007ad81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD81 11088 bytes
SHA-256: b274f2610ac0651caa960df2d678eec74e607186336e2e608ded3639ccbbcb36
font_01_sfnt_off0007c770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C770 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0007df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF8D 19388 bytes
SHA-256: 22b49fe80659c3e5c8da7dd68e1a77c8baed1912d8f00d86a7bb595417009c63

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