Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2714436100ac585…

MALICIOUS

PDF

81.8 KB Created: 2021-07-24 01:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7bacc887fc868a83c1d74105dbe89aef SHA-1: 288f65a2e4f7a679827303dc6d8c913918febb2d SHA-256: f2714436100ac585217f1b17720b5915c27b183c47d0d34fc0cbd4d946917f1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as redirects to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pioneerlift.com/upfiles/editor/files/kepogipazojomatimidufebiz.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00ff960a4e---33139504134.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5t1dmbjdul1r6eddj5usd6thct/doraxemerapa.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/5medcc85f8pflvdumkln0kuh3d/sonifiwu.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/85f2fa68200ccacf84ba90c5f59ee16e/5730766730.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/396adb0d70ea092766aed02813d22e94/wubapevawuxapijaza.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/52134306b6078777a928868ff4ce44cf/tezawopalegomofedetuperab.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210628050909.pdfIn PDF document text
    • http://bscartridge.com/pic/sigabafugupuk.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d05f64b89c01d420a8b0a688463c4dbe/76993589309.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/aa85313f3e0bc4da82faff784b3fcbbd/77034571563.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2f87b6773f50b3fee79e252a19aefa23/20391875182.pdfIn PDF document text
    • http://www.520amis.com/upload/files/jisosijagipew.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/kegiregobexosabigujogug.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075eac470228---wanudejiv.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e0ac24ef---68686649866.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/zebuxupuxi.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f7e885aa4---96988554347.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e24d174a60c6625df1f007e749ce7651/44301036145.pdfIn PDF document text
    • http://willbramephotography.com/52832528512.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dba70e7369---48309667040.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/lekudapukoxitagezusuti.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebfb35797d---33612049638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=hungry+dragon+hack+androidPDF 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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 18532 bytes
SHA-256: a9f8e2f2915f62ae6050cb49abb8352fa9570a87badeeb63cc7e6c38c274322b
font_01_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12226 10500 bytes
SHA-256: f1f91336ae3436f1c3171a18900c9d555b4da71a98d1f953cdc82fab86cdcc01

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