Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e2039e209f06d5…

MALICIOUS

PDF

92.4 KB Created: 2021-07-16 08:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e35ab9238b35a11a316b1bab62443f3c SHA-1: e70902f55e4e156aa704e2c19d8aa228d739d572 SHA-256: 00e2039e209f06d5eb3fb45a1ea428595ffb935ce628c30b1834bc98b1f50379
196 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, indicating a potential distribution point for malicious content. The presence of a 'Password-protected archive handoff' heuristic suggests that the document may be intended to trick users into downloading an encrypted payload, which is then provided with a password to bypass security scanners. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://canxetaianhduc.com/images/file/26361980141.pdf In PDF document text
    • http://okzawidow.pl/img/upload/files/degakukozivigoguwijejag.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a150c82fb---71471468116.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160747e4053bbd---dupade.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/55558375046.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/8350e169c1250d338429c155ecba68c9/fudesexejo.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/3647887332.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/mebofaxurobegex.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/23995280011.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3hkv4vam84psgdtvbnb5o3equ0/fugimedi.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/faxigu.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/bojojevemizefexozulobir.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/gigemufenugokaxut.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160985d2b3aec0---20891921287.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c3be80702---navizonusero.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608081e7e54b3---togata.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/p5avcjga7ionn0kodaik23kn1e/wutalibuxinizarajex.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/52066744015.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e2972220e---kexenimefezib.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2f2463b4e7bf7b5927be357e633a81d4/46889878803.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/54922789656.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/7676222900.pdfIn PDF document text
    • https://nada70.org/userfiles/file/14239968079.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ielts+reading+answers+of+miles+davisPDF 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_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 16600 bytes
SHA-256: b569ec72cd2edb5dba490659b113e5f306c222e8e19bde0239c61c2644dc2195
font_01_sfnt_off00013347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5E 10800 bytes
SHA-256: b6f7cedb88a39f70d612ce2ad341df869c51cee69d31295305526b488b0897b9

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