Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd459b583cdf9ef5…

MALICIOUS

PDF

88.2 KB Created: 2021-10-19 20:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 11c8cc11c477ec66ec1b1c52e5172941 SHA-1: 7a81fff95905db5ec54f59f654581055103f47f6 SHA-256: fd459b583cdf9ef5409355da52006a0ae0384547f88b2bbc9a6a1c9ff63d9c06
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised upload directories, suggesting an attempt to distribute or host malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9795

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://baigeleather.com/userfiles/file/lurozeketozebadetuwefisag.pdf In PDF document text
    • http://kpotplace.com/uploads/files/radufagawetet.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/49184895650.pdfIn PDF document text
    • http://aaaa.handyfriendship.com/upload/files/zolepexupobamokuponimome.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/nebigabuzamitug.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/najatososunobo.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/95515089258.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/161490fcb4db81---depiwatirezubavegijap.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210927_DDDF62BFDBF5A5DC.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/pududolosanudagepoleta.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/wupafudukenu.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/jaferabolazof.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/vazilijomitapiwapuketav.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/76814158539.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/buwiguniganiderexogo.pdfIn PDF document text
    • https://brillimet.com/uploads/files/202109282247467718.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f67bef755---97427112688.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb4e2400c8---xotizibepewegifalabiziw.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/25819785856.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/3847678443.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd158aca95---zuvirarelonar.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/rujipufafopejukupenisaxi.pdfIn PDF document text
    • http://scsytech.com/upload/files/dubisofemege.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/8695302719.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f396a2153a---69744820243.pdfIn PDF document text
    • https://dpengineerindia.com/admin/userfiles/file/59198137689.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/85601731927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/EqozwcbAC44/uplcv?utm_term=how+to+get+landorus+therian+forme+pokemon+goPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 18400 bytes
SHA-256: 0a02678016badf0b06b8fa1e03b0dbbbf702abf2b67cef3942913a8f2be37a79
font_02_sfnt_off00012e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E24 2116 bytes
SHA-256: ab533a5d51322bb9ca4c521ce65fbd9b45b29d92270b05f40912b5559377b7bb
font_03_sfnt_off000137d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D1 11212 bytes
SHA-256: ca9d024bdd74def80bb75904ab1b99f97076fc781f6cad58b833f18a96cf0f4c

Open this report in the interactive analyzer, or submit your own file for analysis.