Malicious PDF — malware analysis report

Static analysis result for SHA-256 802dee192f89dedb…

MALICIOUS

PDF

82.9 KB Created: 2021-10-13 13:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8045f2e82c41c91240a1295183c26faf SHA-1: 6c90a359aaf3252a02486d3fcfc8473b98465f0e SHA-256: 802dee192f89dedbdad627404e472275bfd77d1792cb27acdc7ae9f11a077658
204 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=new+tamil+movies+download+site PDF link annotation
    • http://dekoblickfang.de/userfiles/file/94233704299.pdfIn PDF document text
    • http://opsir.eu/files/file/64282121933.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/mutewukuxed.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/19699275041.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/wiluzelito.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/35037989612.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/jasig.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/91808624984.pdfIn PDF document text
    • http://devison-matras.com/upload/file/dekekixolonefed.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/37279712017.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/52408878650.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/87161136961.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136d2ce7f78a---58571353048.pdfIn PDF document text
    • http://gaudi.tw/upload/file/9117992750.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/limariniziropakuvuleso.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614c6b06251d7---10068383226.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d791502e2f6fa4756a07c5864e67143d/69257314697.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/kutenoboboginozugaji.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/rimuzixikufajefizexupavar.pdfIn PDF document text
    • http://yepuco.com/uploads/files/febozixajaro.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132aaaa6bf09---mefomelakumuwazu.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_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 18792 bytes
SHA-256: c43805997280ab428d12ca57e76d6d47fe94a49e765a6a04d298b82f183ee593
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001264c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264C 10436 bytes
SHA-256: 595373e546af20ef16fa908726ce13ced5e1a455ef085d2172e2473552fa48e8

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