Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2afe6ba66320586…

MALICIOUS

PDF

91.8 KB Created: 2021-09-07 13:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cc8c670e8d791fd0dcf75238b2d0ce4d SHA-1: 8748a69d81df63b78a41a1595eb2984883691a1d SHA-256: e2afe6ba66320586b239ce4c1592330af26362eda9860e9a8ab770581cc2f957
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple unknown PDF files hosted on these sites reinforces the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160788143c6735---10138263799.pdf In PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/3dd78rnb3vqpcn5rpfph99hn6m/68071326130.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e6b266601---70626729793.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/43584409600.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/36974133635.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/7496738973.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/rnh21r0s6ttmr0ja0plhuaa9e7/32884479064.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a732f8ed930---nupoj.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/78745423509.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210616_072232.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/aa6fcc3fcd7fd97ec94d9720eb0f48b8/terorodifulivadolugigonim.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/68382467276.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/1763113473.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/5582891371.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102f80c5666a---lunovuxajewopinugovuniwid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tutorial+for+c%2B%2B+for+beginners+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_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 17988 bytes
SHA-256: 522dc8635437e58759267f0e0c38083c4abea89141cd37be8577a5f697fc78bd
font_01_sfnt_off00011b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8D 18396 bytes
SHA-256: d0397a19e2f1b4edfbe5372a4475b861a0c0f2ffb0b5a20d86b3d96f8fd094e3
font_02_sfnt_off00014ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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