Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacd4748fe2bed95…

MALICIOUS

PDF

69.2 KB Created: 2021-09-25 06:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4679687387eac794f9f0466aeb501c44 SHA-1: 4a9255962829c24ab57a7bcd66865b34cc844a76 SHA-256: dacd4748fe2bed958134c56514f3e7f2ad1a4977fa30a6edced50e31a4963661
176 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, including being image-heavy with clickable actions and containing numerous links to external sites, some hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://spain-ex.com/images/blog/file/fojafimojinevofuw.pdf In PDF document text
    • http://youil.org/userData/board/file/tanelojajatasodaxojo.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/jabekazijopozowewiw.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210924001014.pdfIn PDF document text
    • http://kdesignuk.com/userfiles/files/wilojakirilutit.pdfIn PDF document text
    • https://olterus.net/contents/files/31321588863.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/84964813281.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/wolasajigoramuz.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/161386594b9e31---30013348671.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/43191302026.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/66313743738.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/lekelaxoperezigaduw.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138a304543bc---lirojixane.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4f73f5e65dfc0f6bd72d77f01390c9a9/lumawifurejitozoribo.pdfIn PDF document text
    • https://eclearusa.com/images/file/79276687716.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/66883455972.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/55978597458.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/vavozosofipefira.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/96089283126.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/37047167344.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/92282719092.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/witabupuxoxabupuwakepa.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/54924132437.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/vuvogubudotamipeve.pdfIn PDF document text
    • https://mlspoland.co/files/file/jojineso.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/99026623564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=after+fall+winter+full+movie+watch+onlinePDF 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_off0000b0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC907 10668 bytes
SHA-256: 6e2b5b48c4e191affb7ab60eba3e23e56dbb0737c4457b09d02af107c3ceb7f3
font_02_sfnt_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 14496 bytes
SHA-256: 7cb6154c1cc0339567d453d6fb90d3a014e4ef61b0e009c4d78d69d6b52f56c5