Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6806bf62072312…

MALICIOUS

PDF

79.5 KB Created: 2021-03-15 19:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00b783d4acf594afb6eba8300a434e54 SHA-1: af22c91aa8326afd80923a383f00064912570acb SHA-256: 1a6806bf62072312915c77fc73155c40b4012178369f11643b38d8f5e17d24f8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the embedded URL and heuristic firings point towards a social engineering attack designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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 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.
  • 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://yafferge.ru/wb?keyword=magnum%20x7%20airless%20paint%20sprayer%20for%20sale In PDF document text
    • http://fruittea.space/tukavufisopk9b.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/fusixojukoxelumoluvurager.pdfIn PDF document text
    • http://instapriz.website/tenth_maths_guidefgsdg.pdfIn PDF document text
    • http://checkmyscore.info/kunilufoparovujulojasey3u9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486190/normal_602b0eaf886e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488314/normal_5ff2c09393184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5fd7b1b32cbdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_5fdc78d119d2f.pdfIn PDF document text
    • http://dutov.org/loluwijozodenadewenqhrg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_6039c9ba260f0.pdfIn PDF document text
    • http://mivetys.xyz/bosch_p7100_injection_pump_manual_download6vav7.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/xurulukunis.pdfIn PDF document text
    • http://fewudutizoxom.medianewsonline.com/bagikozizebiranib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/any_sqlite_browser_plugins_or_tool.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_1fdb521768fb494bb12b066e5df313cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokudapele/example_directed_writing_report_spm.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_84cbd9a161ff4b179f0fd614fce2f410.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/lagu_christina_grimmie_just_a_dream.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/6165965991.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_95aa2c1f303e47fe8d157976ea7612f0.pdf?index=trueIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_daf2136f93364dd6899ebf4e9208932c.pdf?index=trueIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_cf056319ad3844d592eb8519841b7651.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/niwab.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/43072751681.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE323 5476 bytes
SHA-256: c1ae796b24a8d40da8239e91a092299e36aac6b3950e4b25b896bd9b6d9bad01
font_01_sfnt_off0000f5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D7 10896 bytes
SHA-256: 51110e89cf7de26906d14040bca163d5b8ac8e8b05986b7c6b85404513773195
font_02_sfnt_off00011b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 16092 bytes
SHA-256: 0be84d2d0547f1f02aa0071b49020aaa73ac7e6a4c4dee27a4da8627c6f2d0ef

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