Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bec1ea8838c5f6…

MALICIOUS

PDF

148.3 KB Created: 2021-07-08 08:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2aa4fb3fd604c66886f4923cf0aa6c57 SHA-1: 0706978cb23e3c36297e508bb077fc04a0682bf7 SHA-256: 92bec1ea8838c5f6eda5dd03ca1594300bb4ff4824b0b5a1172de35101ea2961
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 and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The primary function appears to be redirecting users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079a9536ef31---mexetuv.pdf In PDF document text
    • https://alate.org/admin/fckeditor/editorfile/funudikazexusenubuniz.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb7a1e48f4---lininetutor.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/9165063806.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/a0rs9pr70bgosngksrr78hcjoi/89565989493.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa06689e5e7---51825535684.pdfIn PDF document text
    • http://specimport.by/files/files/31077987609.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b574eca158f---15713054338.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/23304474101.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f84f55ae35---lulim.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71ef5a6073---vapivu.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6a9ce7ba---vazipibosulunalo.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c62fe9c24a0---12183417556.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/67110938495.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/330ef9dd3c9124bcb2084b3e6f029433/romisagibunum.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/54119102698.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/walikozuzepufanosiwupe.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/lelifuzegowukosodukawer.pdfIn PDF document text
    • https://goodline.by/userfiles/file/nuvuzugafetenimusoziloni.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/4193465600.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/8fe5f7b6cc2660f90af52ce1712c064f/ruwomad.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ed0c14ed6---suwosane.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/af4f2642950de5f46cbd98679677ddc6/zarojule.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d07d985bda3---lexazixorotob.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/rowabizawagusax.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/83019856580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=these+are+the+components+of+an+ethernet+lan+exceptPDF 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_off0001dd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F56B 10716 bytes
SHA-256: 75d00146a8aadc12bc2eedae645be3fe638bbf9d760ef1e54b3713ac98f181a3
font_02_sfnt_off00020dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DEA 20016 bytes
SHA-256: 6f82aa2472e8cb5333e404a70ea83aa370749253dc3db3cdb50f8c5d216d2f92

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