Malicious PDF — malware analysis report

Static analysis result for SHA-256 baec175de451e561…

MALICIOUS

PDF

86.2 KB Created: 2021-07-14 02:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 697e185e9503f8581822ba00de459c07 SHA-1: 5a2252a6597f6d1c46d97b76c29ac3d3fe59dbdd SHA-256: baec175de451e561e4b755ec310f2dd2204360788469f3f02533b44eb9da4c52
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/6gt0ikq6a7ijri89f5omfkcjh2/49465924756.pdf In PDF document text
    • http://studioboscono.it/userfiles/files/seduxaruripepujomu.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9a63f7b047b3dde582f84df355920a86/32680743474.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4720aa086---8619594797.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/87933002931.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94be89208e---tazabititikipuna.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d5143c45---55862916011.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/iti0rie5ji3dnkf4h7b9i48jdr/47735346651.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/golison.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/duxavozuxasumajavaveta.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/6c790c1fc094efc43ac8a34df5cbfb34/luzesilubavanekogiladinu.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/sanasexusat.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/54989221097.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/67338816695.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa5d35ea6---subolo.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202161405291594.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fc2950635---bifepadisadunil.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/77302019783.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/5436847225.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/fewipujanenarapag.pdfIn PDF document text
    • http://parentini.it/userfiles/files/xasamefemexufawaz.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/n2oalf9l142855m8otojiai6e6/87275233725.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76389395df---18376275570.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/liwiwe.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/88937310254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=federal+freedom+of+information+actPDF 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_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 17016 bytes
SHA-256: 6862544515206a2086d5be3e6b71f83cb502f5a7023ada35b47442a1f280ad1b
font_01_sfnt_off00011b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A7 10444 bytes
SHA-256: ab708c58b25d385ef0fd35156edf8560554f339b232bfe446a46a0d32da3124c