Malicious PDF — malware analysis report

Static analysis result for SHA-256 314f2c8cbafc51cd…

MALICIOUS

PDF

216.9 KB Created: 2021-07-17 02:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a2bff377d5d7112121016a793a090b26 SHA-1: 3ea122c7ced3f5169c338bd6804fcf13b68339cd SHA-256: 314f2c8cbafc51cd13f2cf12832cfe48b282ed0882fac445a8573a2af67d6d92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous links pointing to compromised WordPress upload directories suggests a phishing or malware distribution campaign. The file likely serves as an initial lure, directing users to download further malicious content from these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

Heuristics 5

  • 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.
  • 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://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160adf4a15d1e8---60783967875.pdf In PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/bv4sksnn2ge1r49091gtsj8lou/92470975995.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/nelepuwezuxiz.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/nenukilon.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/9929f75588adda51d7ab67382cb25b1a/mexivelimebabonutirasil.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/3b481cd2b19bb548ec5fa13f11f43353/ketogibidigune.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d99e8993c---weligizuzemol.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0050da1b93---85762403024.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/3h888ib7cg317ualgrv0ikmdri/96643186699.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160867286f3794---14846176278.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b4b013f6---73746598106.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/s232m02tntksptfhqqkjr9n36k/jafix.pdfIn PDF document text
    • https://linardi.ru/files/file/bavixeluvabujon.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5efc41c4e---90028994139.pdfIn PDF document text
    • https://pmfegypt.com/userfiles/files/dobafarubuvozewejukoxeduk.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cadfe37efe1---71044609667.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/o5j4miflget0pormng8q6eatd4/gesinojudarorakanuwira.pdfIn PDF document text
    • http://novichiha.ru/pic/file/gifufefonoxotokutagupisiz.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/mutel.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/95160505645.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/97802681588.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607186b826e80---mawomumidemotakumuduwa.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e265320155a426293c1e2d2c2f988ed5/36249106757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=nominal+head+of+the+statePDF 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_off0002e7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7CB 20512 bytes
SHA-256: cdc58259c77ddb43b581473ed763ab68a9c5178040c7bfee893612b45e1f12b3
font_01_sfnt_off00031ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AE4 10496 bytes
SHA-256: 7f0900eaba651703dda756df92d0808d2ed3ff8b45e887e59ff21aa07d79044b
font_02_sfnt_off00033280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33280 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00034a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A8D 2480 bytes
SHA-256: 3c64dc71316c03de599ca381cf8e0fd2297cc54b0aa350ffc508f5270781c71d

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