Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2270c5a0b6b24f5…

MALICIOUS

PDF

71.7 KB Created: 2021-09-01 08:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a9db5e057041b2ac0729283a4244196a SHA-1: 3fb2f4526f1da781b7267fa4c0575d93053987b9 SHA-256: e2270c5a0b6b24f51db1a8ce6680ea60bd3cda928d6f79096167c3e7cdc18190
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs and the structure of the PDF strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://akamercedes.com/images/uploads/files/napadi.pdf In PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/kedonorile.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/20529169022.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/mapegoxerujuxuto.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/parikijofot.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/53627745956.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/43652623431.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/edccno0vdjvlpa6j1b306mdcca/83539131536.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/111728991.pdfIn PDF document text
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/vozaje.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021072006172580554.pdfIn PDF document text
    • http://asfalon.com/__files/file/pedopewimiroxataku.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/63471639784.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3f0d8322e8493ed973f28415fdce6d9f/satodadiwatixemimewi.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd2de35b25---moguwupofu.pdfIn PDF document text
    • https://davaocarrental.com/images/file/zujabepazag.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f888bde903a---togunifajeve.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f10ea87475d---wufexilanoxowalobafakam.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bade813bad7e6157146f10d6165f1ee6/wifopoboba.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/8064184709ca2ed38154996bab9a20bc/10896227650.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/40935255248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=new+day+greetingsPDF 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_off0000bb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9F 10436 bytes
SHA-256: d6eeb00242fc05ad186ce58cc2c8c3a4e4eef348ee0c7bc92ac10cb1d2681c1e
font_01_sfnt_off0000d340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD340 14908 bytes
SHA-256: 7d1283ab9372e954badc4ebdf5dd7e731e377aa8bb15df338cf316dab09f1c6f
font_02_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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