Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6ebe57456e2c33…

MALICIOUS

PDF

73.4 KB Created: 2021-09-04 22:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dd75871d7ae8d7a2ddc18b51c0f790a2 SHA-1: ebe9e51d76f88566b24dccce14c38e3cab9cb0fb SHA-256: 5a6ebe57456e2c33c92d88200778378f4e2c3e4c2fd8a3b635f4acb726cb8bcd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to facilitate access to external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://theelementrama9.com/userfiles/files/71574114412.pdf In PDF document text
    • http://hoteldanang.vn/uploads/images/files/lijilo.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/setebimosojigijev.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef135750fa---97481689231.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/01a2511dfe13a3d8d2de170d379bfb2a/tujetixifobexaxikapejobi.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/c18oq8lhgf9mb2v09aqk30lr1f/jemilol.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70bca0ad28---69146181216.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16095dcc55b9bc---11235175659.pdfIn PDF document text
    • http://candientuvibra.com/images/file/bufakegabugefepofujixab.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/0d6906eb55a45ad8f6b32fe16e55f6c1/pekavapo.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/44755810611.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/rujefanuxivu.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/68474684659.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0c61a44be804bf0d3c13622d8eb330b5/68507582672.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210803_37A352FDC8CC2C94.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609085a9a2692---foritivobolazuluduruwi.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/fowaxixasuwiwukitiw.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/49992013144.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/55058786208.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/komogodedumoloxuvugovapar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=classifying+animals+worksheet+2nd+gradePDF 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_off0000bc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC82 16176 bytes
SHA-256: 8a2be7d87f3a8d90f4ba6e41bae31951fe8dbd65ffdcddbdb9bfdc4c5d57f767
font_01_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 11244 bytes
SHA-256: 75d15639e2f436b8fa53b3cd4245b4679be09a138633768fca61d5d50e24e9a1
font_02_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.