Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ae010d05fd0af7…

MALICIOUS

PDF

70.3 KB Created: 2021-03-22 15:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44517afb149ea332c58b553716225c22 SHA-1: 217797fb40490a55a366eb157cd53c73261f480f SHA-256: 10ae010d05fd0af700de5fb3caab01d02e3223571f16d9ed351cfcb9ae2969d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=female+muscle+growth+stories+spinach
    • https://dirojobadenanew.weebly.com/uploads/1/3/4/1/134109317/gaseze_kusiz_tazerijenid_konegagosixos.pdf
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/f3ddba.pdf
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/c45947c7bb545f4.pdf
    • https://sewetupowak.weebly.com/uploads/1/3/5/9/135971958/wotagerirubutalipo.pdf
    • http://vonowaz.iblogger.org/tewawewebogom.pdf
    • https://wepizowo.weebly.com/uploads/1/3/0/8/130813330/2577231.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/jabibu_mulijeditudodat_mililinip.pdf
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/zosos-sadubozofus.pdf
    • http://romeital.space/tipekelixaronave2al.pdf
    • http://thefortykuti.com/graham_greenewqulk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/latufenaw/botitunudozogelarome.pdf
    • https://uploads.strikinglycdn.com/files/33c29d0f-5e8b-476a-b75f-08aca2618299/why_is_my_ninja_blender_power_button_flashing_red.pdf
    • https://uploads.strikinglycdn.com/files/d08faedf-1af2-4037-9af6-5617e68b9e5b/82708712779.pdf
    • https://s3.amazonaws.com/dezajok/themes_powerpoint_free_2017.pdf
    • https://s3.amazonaws.com/lixasifasi/35300134920.pdf
    • http://milisepidug.rf.gd/fluvial_depositional_processes_and_landforms.pdf
    • https://uploads.strikinglycdn.com/files/d505e0bf-9949-43b0-b6e7-c499515e464b/sintesis_del_manifiesto_comunista_de_marx_y_engels.pdf
    • http://tuvatopuvonu.epizy.com/real_estate_flyer_template_google_docs.pdf
    • https://uploads.strikinglycdn.com/files/c8511dda-917a-4880-9961-2d7f23b63fa5/3_rivers_locations.pdf
    • https://uploads.strikinglycdn.com/files/e4fe4fa6-01c4-44ad-bbbf-921a68e66854/camp_x_ray_full_movie_download_in_hindi_hd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d595.bin
035fc08e97f312e7db5ec865023f220995de3a3df52d6b8f72cdec6037050873		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 5396 bytes
font_01_sfnt_off0000e7d2.bin
e9a07312f4cef3de4b3e1d66060e4d92c3887a2e96fc4f74d99a07a85801aa59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 10596 bytes

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