Malicious PDF — malware analysis report

Static analysis result for SHA-256 529709119952b080…

MALICIOUS

PDF

90.6 KB Created: 2021-08-08 18:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83bdfb80ef779cdb9937f938b2028b28 SHA-1: c26ea600d3f1b062eb4cb4885242fd45b02a9a38 SHA-256: 529709119952b080543e51a28626428b977cc75ba9abc8c1ac705a5dd0da14ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the structure and URL findings are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alakharia.com/public_html/userfiles/file/jemosivifilulol.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/biviboxujovifuvotabomuni.pdf
    • http://alaskacounseling.org/clients/8/87/870ae3779d21e956d596131c1dd113ff/File/xudagudimusozodomoja.pdf
    • http://parbatsamajjapan.com/img/files/files/45039694422.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/l6d67sbj7ekhf3h2kl7hp5s95i/74486049615.pdf
    • https://zold-kommando.hu/files/52500686488.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160759332865c4---59785347887.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/qkf4rfkqv3mh2gpmsm6ik7pbhj/xobufoxirumozipomitivop.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b76ec013c3---vejewepitufazezepa.pdf
    • http://energo-winstal.pl/userfiles/file/8223746868.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/feforosejulab.pdf
    • http://mobilesamara.com/img/files/file/nedasajamedikubas.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092ce9c7e410---mufagukavafonu.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/55f28f3fcabb8dd903b0d13f6d4b1cb0/kulipapuxafugoza.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c53ec2cd808---10778868462.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/23760913532.pdf
    • https://vicotelecom.vn/static/source/images/file/71261573578.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/vn0ea0g01iumk8jvr7paov2usg/29836804350.pdf
    • http://smartdeal.pl/files/upload/files/71549300676.pdf
    • http://tantusmarina.com/UserFiles/file/30294347182.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b91884943ad---binudolexedodi.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/fsc3f37ljiabdjfmj9de35bnl0/kenoxagonuzadoz.pdf
    • https://dacsanmyhuongbeti.com/app/webroot/files/images/pages/files/jixedixosalegik.pdf
    • http://royalgroup.at/tmp/gudonobexamoponogekekoju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wwe+2k15+ps2+iso+download+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa74.bin
fc9d16064f38d529fe5d381d99e73e96bad422c70175bea39aeb42b5337f8a8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 10868 bytes
font_01_sfnt_off000113d7.bin
5b6e737ad2c69fecfb0d9775c5e0c76d0443d749a9e3838e93dcb2080bf254ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x113D7 18276 bytes
font_02_sfnt_off000143ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x143BA 16792 bytes