Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9126615e8f39c6…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 09:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e5d191a3d07a461c6743f71d579c672d SHA-1: 46e36ef6b284ffb2c3d4dff522ee42f788e59f85 SHA-256: 7b9126615e8f39c66b6e940935aaa2c02308db09b42a0e4d456264b575f856a3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS platforms. The document also contains instructions for handling password-protected archives, a common tactic to bypass gateway security and deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hermosabeachbungalows.com/userfiles/files/papidiko.pdf In PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/13106e77dd8ca128967eadce5b2cee41/59881265638.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/xizumejavosatir.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e9488884495d4137f5dcced50fb60da0/limugowagivaxi.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/pasivexilataguvekuvet.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/ffbb2c5ec3aa07be3613717b1a2185a3.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/jarepanakivemawoxegure.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/xivabozutowe.pdfIn PDF document text
    • http://zlzljc.com/uploadfile/file///2021081910033319.pdfIn PDF document text
    • https://mackbeks.com/files/file/tesalazemilol.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/50541911526.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/51355331464.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/wotabawup.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/22857539910.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/k2emac584cpchc62jnm4e9277d/39667286619.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog//file/gumetuvuxokonojesiwepibor.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/walawaluronaxuzije.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/87447781.pdfIn PDF document text
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/sivavigixo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710e3e26870---vikaxuxolo.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/05/ramefoluj.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/48688076921.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/poroxizivezola.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/68041434644.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/subizeluduvopalejutif.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109061025212961.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/16166476302.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=amqp+tutorial+pdfPDF 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_off0000d673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD673 10480 bytes
SHA-256: da4cb09b03ade31fb3d4084688a0b18c945b4593bfffe83394a2a34436ab1668
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 18544 bytes
SHA-256: 0e4199e17426533de29b55ecd650e806cfc753efab1ff1b23d06e1afec6630ba
font_02_sfnt_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1