Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af860f8f2ee6866…

MALICIOUS

PDF

70.9 KB Created: 2021-03-23 13:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a43ee8fb104343da6b9de1af8a750d68 SHA-1: 901168dbd54cb036b8a4b8972e3c481914dec72a SHA-256: 9af860f8f2ee6866bf46cc18c05a98edd98f96a638e1945eee203b374bf33b5b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://leonvi.ru/wix?keyword=faily+brakes+apk+para+hilesi PDF link annotation
    • http://businessoutsourcing.info/gitudolulatew2hbgl.pdfIn PDF document text
    • http://teachost.com/54325033144hxc9f.pdfIn PDF document text
    • https://gufobetatogeset.weebly.com/uploads/1/3/1/0/131069923/rofezibexun.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/xevogonejez_karuvorefonop.pdfIn PDF document text
    • http://siwutasir.iblogger.org/journal_entry_template_excel.pdfIn PDF document text
    • http://sweetmeet.online/kepefowuzozevomesonoben2luy.pdfIn PDF document text
    • http://ig-socialmedia.xyz/76000318803bjt6g.pdfIn PDF document text
    • http://flowerport.market/run_vba_code_in_excel_onlineuh122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimorem.epizy.com/chamma_chamma_new_remix_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/16573826577.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/hamilton_beach_oven_roaster_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/pumoko.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/87356284045.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_3327b071f95e45e9a2978bcc7901d723.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/the_norton_anthology_of_world_literature_4th_edition_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/lusetagagevudepekukedaji.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_e45eaa3d2d0e4b569052de87a29c6fe8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xelimewat/14130525559.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_def39a243def4691b5a478235db3359b.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_dbc09013ad704a6bb744ddf964cc2edd.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 5168 bytes
SHA-256: 213693ba10ff529d95f9ec521097c9cfb75e25dc1929d2161f1499444714c2a6
font_01_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 11756 bytes
SHA-256: fdff5f81073450121c850740b2ad9e50aa3a2162e2c6f1bd5199ebf86d33c3fc

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