Malicious PDF — malware analysis report

Static analysis result for SHA-256 b464949d84ae3844…

MALICIOUS

PDF

121.3 KB Created: 2021-09-07 09:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b9b813905f639d303dcba4dbaeffaaba SHA-1: 01dc2541ee39c1b55e40b68526a1eab2eaba0c3b SHA-256: b464949d84ae38446d089788de88acf8c0fa7c85e4b8ea2e8051ce93995c62b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of multiple links to potentially compromised CMS upload directories reinforces the attack pattern of directing users to malicious or compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f33cb2e00913bf0d07e470b4fa32d17e/varamorokok.pdf In PDF document text
    • http://grupophi.es/uploads/files/407265741.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/18939f51f7652561764348cd4e018463/43864907811.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/10318810265.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c687dbadc7d---53387559727.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f63d0581ec---94699074882.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210703011826_u93sfv.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/08408027c9a570b363fe0d39d7ce2ebc/vogenulubugabazafoza.pdfIn PDF document text
    • http://nfc.soo.jp/file/1787184725.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/15642767608.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/31062991997.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/abc4f2f54456325c20b24c1b6c86495f/78441240972.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/wewuzojivorulikutorikirif.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094c43120085---ladejalepupawesuvu.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/bpme2i8q96ooi4n91m722g0n9e/71398753276.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/61078833237.pdfIn PDF document text
    • http://e-hane.com/files/vixilubimo.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bf6989d67---98316474541.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b491930cf65---pegimozonepebuxatosivusur.pdfIn PDF document text
    • http://reflita.lt/uploads/files/94432242660.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/87395915199.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/forosa.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/jixolulipapetuwuj.pdfIn PDF document text
    • http://immopolignano.lu/images/fepefakifexajifenelu.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/gelurezosanibe.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/83prn9hm19eavn7ilesppl20j0/nanizoxekiduxuke.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/j2dkb55kmf5d2ke3hk1mo6pksf/45905651946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=problem+solving+questions+year+2+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_off00017040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17040 11528 bytes
SHA-256: c269af5c09b4316c9c1f87448d0165c4b09e4f629773b00694d5b13b63a4b5c5
font_01_sfnt_off00018aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AEA 20156 bytes
SHA-256: 6028e1a428515c0a49ecec9992c1271c6d8ee279160c86640b8e5e0f550e9904
font_02_sfnt_off0001be85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1