Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d7b7a0b182da36…

MALICIOUS

PDF

75.2 KB Created: 2021-09-14 11:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7c54539b6f78331fcb79e007b8c2f298 SHA-1: 3690582b9db0d350c7f079999d274a7da8b657e4 SHA-256: 06d7b7a0b182da360e6b4c16970f2d3763288f78bf25c3f5af9cacef41ad7c27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains multiple links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d54476cf65---lukimexafakejejuxowi.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310dceb4b2b---54355032271.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/54bc0e96da94b2a73b018d272658f374/kifuzozofunapevubagotu.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/8194261532.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/58092794324.pdfIn PDF document text
    • http://djpress.pl/Image/files/lidekibomafatowo.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/bokezu.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/dezipiwosujoremukurato.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/gedafuluxazix.pdfIn PDF document text
    • https://ana-jsc.com/upload/files/geluxexulagixexojevop.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/88774136436.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/53928573901.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/44543089758.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/vobizubupimop.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/95452810077.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/86842224272.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/jenamojiguwam.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/76119449101.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/xibegenixolomitufejotobur.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba2806838c---pevejekedepunonalugiv.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613597bd6302f---vofemekudenikaloxebule.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/jupabikonigawovenupubo.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/96218403507.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/gifolidevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=android+tv+player+appPDF 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_off0000c585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC585 16308 bytes
SHA-256: c9b3ee41add1e627472570a0486ce4ca1d20635c3ebbc85938a031db38e2035e
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 10376 bytes
SHA-256: d5d7129f9e1b6a57d4da7cd321cdc92dfd4c246d7fb4377c9949235948efa47e
font_02_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1