Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3feb08c7950084…

MALICIOUS

PDF

85.4 KB Created: 2021-03-29 20:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 688ae9d8ba4de23e4ec095bba1a23441 SHA-1: 7519ae71a6b6547cebf3e5d1937c08fcb129ba72 SHA-256: 6b3feb08c7950084c27090688d335da0eeb51265fbf9a79614a478f69bd0b563
184 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to a delivery order form. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=bon+de+livraison+mod%25C3%25A8le+pdf In PDF document text
    • http://cyberlife.store/kaloxofxltk.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/iiif9he/zugorofuriziwerajotusipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6030ccf5e6ed8.pdfIn PDF document text
    • http://helplnstagram-confirm.com/dunigatizut1wefs.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/kijchgo/visolonos.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/gujarati_barakhadi_english_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366956/normal_5fc7b69ca3e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_601e15dee51fc.pdfIn PDF document text
    • http://trastenmyqort.online/davexepidewejabe853q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_603341ae1e610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5fe2052a2208a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ae3941-226e-491d-ab5b-da84998bdf76/gelibexufakiko.pdfIn PDF document text
    • http://bepidinotovat.rf.gd/sugajiv.pdfIn PDF document text
    • http://galiwasik.rf.gd/patopavusogisibebigo.pdfIn PDF document text
    • http://bepelugokuzo.rf.gd/corporations_act_2020_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c137d4-3b83-43bc-94ea-68510a35d01a/paruvegogax.pdfIn PDF document text
    • http://xigibisas.rf.gd/the_haunting_in_connecticut_300mb.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5440 bytes
SHA-256: c9c5c424d32d738d917b1ebffd89033334af8c091bf42c38c63c569359cfce5b
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 2496 bytes
SHA-256: 0785408a21ab09a1809c7d346e9730a160deabc3efcd57617565145f73e03bc6
font_02_sfnt_off000109cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CD 12104 bytes
SHA-256: 6be5ce4af1ac6a75f67d5714acb538f4816bbe6902cd6fed1f3f34d99e9ad259
font_03_sfnt_off00012ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFB 16256 bytes
SHA-256: 37e046dea0a6afbcb0b53d803d499d72bb9f8358f470e81e40e948521ebb81ed

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