Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d582d732137ccd…

MALICIOUS

PDF

72.9 KB Created: 2021-09-29 09:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7a8d3375fef882c511f3bed8306a0a22 SHA-1: 45595480cbb6530019bc3b6e5d6233143900d1c1 SHA-256: e2d582d732137ccdfabb1759ad7326a927bda84a02b06628bb62f356db1a3cc6
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The PDF structure itself appears to be a lure, directing users to external resources that could host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://musiclivemarsala.com/userfiles/files/82787854275.pdf In PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/94807673156.pdfIn PDF document text
    • http://vititanon.com/user_img/files/41149635052.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/52529462374.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/zokemixofesuromibusefogu.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/51456264629.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/gitonikurezofo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161518d007d3cc---87107263507.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/fekidu.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446190d9825---76946398171.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/37435814846.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/lipesekaximexedo.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/50363113286.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/60522326922.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/38201709330.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/bovokukawareturepelen.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/nevulalepupigomur.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/57867466987.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/88079293932.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614eef741a1e5---nitefuvanuwupojedu.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/36862644211.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/22686296980.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/8837474420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=usb+reverse+tethering+windows+7PDF 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_off0000b4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 10668 bytes
SHA-256: 67ff42c1f7090e84c029582fe0234642869658ee92e3fa2c492e0656040c6729
font_01_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 18892 bytes
SHA-256: aeb7015fcaad15445deda0a34b489e77043080cd85786baf05dba0e7ac95c708
font_02_sfnt_off0000fe29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1