Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f122ead3d1910e1…

MALICIOUS

PDF

93.9 KB Created: 2021-07-14 02:38:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98ad2a8966bea74651c1589ea65438e2 SHA-1: d779148417ec795a5d0e4398ae272dee0bae8657 SHA-256: 6f122ead3d1910e1b90727171eff9f599f88fdbfa500947c7a8f7e4364011847
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/hjf48454lp3j4c8slfavot6og6/76529734306.pdf In PDF document text
    • https://ebooksweb.net/files/file/46941377884.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/agelexibevalomumunosejod.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/zizulikubale.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1dff42a51---lugurejovoxoximefu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070486785786---78719998993.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f208998743---22534953559.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1386e9bb81---nulinifukixetekutefi.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/70754394740.pdfIn PDF document text
    • http://kalikraft.com/images/file/xumajanadelo.pdfIn PDF document text
    • http://canoeing.by/pics/files/27268176006.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/5342984301.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/fuzavewevokujenujefuduko.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/moxawuwof.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/63587637865.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/b434a0bbadb91468ef9780be6fd1eee8/21474793738.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d6c4995e0---93849524569.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/gepedumi.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/duj0ar6n47a0lce8sqpvauuimo/99637302722.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bab22eaf12c---27183503589.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16098be019216c---34930993585.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16078ff1e0752a---11472792569.pdfIn PDF document text
    • http://juha.be/_files/file/80531606117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=wwe+champions+guide+wrestlersPDF 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_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 17604 bytes
SHA-256: 278633469b332876ab40b1dcbbb05eeb5bddac56e75e470f3e744ad36fc9d4e2
font_01_sfnt_off0001371a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F31 11140 bytes
SHA-256: 1d8948fd0430fce34db5222b84a1bfaa6c57a3d565d0b49a11b2fe62dab22995

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