Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dd069476190b72…

MALICIOUS

PDF

78.5 KB Created: 2021-03-18 16:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1b5ca0cb473493e0cbc2107b1dbf4688 SHA-1: 877a8d7836ee30f95b7e5597efb787d9c5145922 SHA-256: e8dd069476190b723a0868c2deebf8a521feaeb212cd54b0811f2e23d1cf0f75
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as a link farm and by ClamAV as a phishing trojan. It contains numerous external links, with one pointing to 'https://gimoguvi.ru/wix?keyword=d%2526d+metals+broomfield', suggesting a phishing or redirection attempt. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gimoguvi.ru/wix?keyword=d%2526d+metals+broomfield PDF link annotation
    • http://tupakewufitid.iblogger.org/please_answer_me_in_japanese.pdfIn PDF document text
    • http://wesabelilunu.22web.org/mythology_by_edith_hamilton_chapter_4_summary.pdfIn PDF document text
    • https://negapopede.weebly.com/uploads/1/3/5/9/135994143/2d6b6.pdfIn PDF document text
    • https://magapevalapa.weebly.com/uploads/1/3/0/8/130874167/388052f26.pdfIn PDF document text
    • https://taboxalitipema.weebly.com/uploads/1/3/4/5/134581752/314165.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/gexojonewegik.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/gelagikagorawe.pdfIn PDF document text
    • http://pogumuwoma.iblogger.org/canon_rebel_t5_sensor_size.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_5d061356f31c43738fe895f41fe20365.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_bded95fc465c443db2d997eb2c54a1ff.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_7d5685897e5f43dcb46a980ea9aae85f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/attack_on_titan_season_1_episode_3_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/sharp_aquos_wont_turn_on_flashing_lights.pdfIn PDF document text
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_29284ca0736d42d5933b4be3d87d1dab.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_03a006f7d58648108b3bfb8e36d81a94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wekibik/nepizipikil.pdfIn PDF document text
    • http://tivozabalilibo.rf.gd/28884546180.pdfIn PDF document text
    • http://wevevaviz.epizy.com/vokobel.pdfIn PDF document text
    • http://vutiwaravoril.rf.gd/how_to_write_methodology_in_research_proposal_sample.pdfIn PDF document text
    • http://gesipimo.rf.gd/xezibemojusimumexuxiwar.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/18769559346.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/high_school_chemistry_dimensional_analysis_worksheet.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 3484 bytes
SHA-256: 866fd8f85cd0130a59e26d5d2ef72782554194052287c2ce3d346dbb443db71f
font_01_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 16760 bytes
SHA-256: b6ce7a4fd92570881cf5bec0dad04a31542adf0ce153963648517606c9a62630
font_02_sfnt_off00011ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e