Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f56da4a147fce0…

MALICIOUS

PDF

94.3 KB Created: 2021-09-03 10:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4af30d13cd0b600985a6fff4713ca32e SHA-1: e5c354c119c456293591fa27d040c2e7bdbc9771 SHA-256: e3f56da4a147fce0757cc4f78c968b13f27a31c8539f41e173428fe7e1548048
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure itself does not contain readable content, but the presence of external links suggests it's a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/f059471cee9e44c96099c47c62717baa/mosebotuwusedoza.pdf In PDF document text
    • http://csc-028.com/userfiles/file/20210725150107_ph5jo4.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883aa60f31d---39529033625.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/eb37b0515920c0bbef340440e42106ea/90339627366.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/47368429083.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e340422b6---45265452621.pdfIn PDF document text
    • http://ipceurope.com/assets/file/54461174304.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/50573750885.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/gipubojadopikar.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6326a153---67547993330.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/xamajosaxifolubitonop.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e92caa005c---tedefakoxikuxix.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/eh318b7v6moopnvji30k4bg9n2/mopawebuvuwosezu.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/72364168193.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/87493340298.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/808671834.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/58075942082.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7b2378fb---muwozurulirolo.pdfIn PDF document text
    • http://axwelindia.com/uploads/25682351241.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff86ce6d67---wovutolanaletizunusedafa.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/jovipafunefatu.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/vigizusazob.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b778bdc0db6---84766719321.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/ratajujejulepufowugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=convite+%C3%A0+solitude+brennan+manning+pdfPDF 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_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 11360 bytes
SHA-256: d75ab463dca51c14df05f9ca1d98b88ae1c75752138e10d403949b9415ea64bf
font_01_sfnt_off00011bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFD 20424 bytes
SHA-256: 209ebeece611efcc572fb5e8370ef7d44fb9dfe616e518c315fa33a51eb2c5ef
font_02_sfnt_off000150ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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