Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab1c9113c76ac11…

MALICIOUS

PDF

84.9 KB Created: 2021-08-21 04:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 86e66584124b976ec3a0f83cae52af61 SHA-1: 57e006fe4f301e6964299c1a37c565eeb9e22511 SHA-256: 4ab1c9113c76ac1135cb8832808ea38c9ee284beb5cb0b9f4cd7d3fa032dbfa1
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a payment redirection lure and a link farm hosted on disposable domains. The presence of numerous URLs pointing to compromised WordPress sites and potentially malicious content suggests an attempt to phish users for financial information or credentials. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://chcial.ru/uplcv?utm_term=how+transfer+whatsapp+data+from+android+to+iphone PDF link annotation
    • http://erictex.com/ufiles/files/dojegaditiloku.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607caf1283486---64501963472.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/kket0osr70q5beikq71pjvcbr9/50640428987.pdfIn PDF document text
    • https://hagepoorter.be/files/files/2031933018.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/pezawapapufidajetakesezat.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6a6b5862---sitewesas.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5632117855---14606869698.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/notamovopatotutakej.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/rabigefime.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/8771693af0bded706ba80d87e6de4eea/56163849672.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/84957145784.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/sixotivupuzinapojaj.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210725044658.pdfIn PDF document text
    • http://www.heksan.com.pl/file/keralobofubuxijosaki.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/12650507136.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2lbop2asmnq0cpf2vsbs3hruj7/xabemadasosutoranave.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/joriborof.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb70ee7a2c---52727371467.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161037ec85259c---67564482898.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/1073b07718ea0673401def369928639e/sabomafufumis.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef0670259---79268842564.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/7267d72a75733c08519e5f6ae6f2e177/32627431553.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/redapasosuzigomivupizaluj.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/be2d41d2f1c00af507900dd4bdac6e75/71289446588.pdfIn PDF document text
    • http://cloverdiamond.com/file/degikawogexufup.pdfIn PDF document text
    • 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_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 16764 bytes
SHA-256: c31da37936d44c4e203e233adae084aae68bdbe11cc8efad15b1cc5f25dfd499
font_01_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 10792 bytes
SHA-256: 9b481531a8cfcf791d21002dc42e38ee9c467c16923ee8f7678519f7850ec4b7

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