Malicious PDF — malware analysis report

Static analysis result for SHA-256 7054e09e8aee0edb…

MALICIOUS

PDF

81.2 KB Created: 2021-09-14 22:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2c48cda417ac888965bec46f121b4ec5 SHA-1: 83fc9998b7052c7995ed90825a2abe4d98338418 SHA-256: 7054e09e8aee0edb464848a8bd6929cc00c1133b702c6b8e9693a8f061c9ebee
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead the user to a secondary malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=mejor+app+para+leer+codigos+qr+android PDF link annotation
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f15f9e54af---44285966927.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/20219822710.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/zuxoboruvezo.pdfIn PDF document text
    • https://thehouseproduction.net/file/kegowulotinaxovurep.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16132669cdbb22---dewivajevofaruvozefir.pdfIn PDF document text
    • http://oa30us.com/userfiles/file/bufelulirepa.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/likosurufuka.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/58005571341.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/xasuviwulepirudozudife.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/xavigotakojojevatal.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/76490991796.pdfIn PDF document text
    • http://arsvet.ru/img/upload/jorarotudegabot.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/wumisexagazi.pdfIn PDF document text
    • https://zagi.hr/files/safogitituvupazubigukero.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3f9d388f2---fanoki.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/91093818660.pdfIn PDF document text
    • https://monyetmesum.com/contents/files/nudubetinu.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/wefajonijugawaxi.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9fe2cf341---refamidawakirujeduvom.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/visakuravip.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/47194488379.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3f0d68829---24560386065.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/titimaxapapa.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090404501369.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_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 10860 bytes
SHA-256: 4a3dc87ee2eda8883cc5b4f96bc4755d8111f14e3d21e3625df6ac84cc5e3f52
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 17872 bytes
SHA-256: ce5c065806d83e4ba8ecd0e02d6b72d7f408b132149a8d60453aaabd35a1da6c
font_02_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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