Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aff2fe7b2f6b064…

MALICIOUS

PDF

114.7 KB Created: 2021-03-14 11:33:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cf01ec190a5a539768a80ace0062f6dd SHA-1: 53c1e2d0135d2f7636a583128389d11731b5f39d SHA-256: 7aff2fe7b2f6b0648bf85ebaa2431e997fdc6b220eef12193da36c32eb3de026
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 0.9995

Heuristics 5

  • 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.
  • 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://soxebez.ru/strik?utm_term=best+books+for+9+year+olds+2020 PDF link annotation
    • http://kajipim.mypressonline.com/gokevopizepexekuvefexakip.pdfIn PDF document text
    • http://madawuboso.sportsontheweb.net/fibekakogalowomatasex.pdfIn PDF document text
    • http://lorebip.22web.org/luduresugisixemaxemo.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/how_to_fix_ue_code_on_lg_front_load_washer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_908c3366d5f447f0bddf724f24221961.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_a5c23b9cefea4081bf0861b0de902fdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/86640725948.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_8067bc16cf1b45cb9bfb65453be6fa48.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_7be84cd99aa5438fa3fa0cd8d3adb6a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/73641561009.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_804a497a42c44c9c8cf00979f39dbbc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/remuv/xipuvasameg.pdfIn PDF document text
    • http://panadokopejed.epizy.com/bimco_smartcon_manual.pdfIn PDF document text
    • http://watawazorino.rf.gd/soundarya_lahari_sanskrit.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_d258a22080e948a5adabadd27dae4602.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/apple_a1392_airplay_2.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_75677f95df7d4bcba898c762261a00f8.pdf?index=trueIn PDF document text
    • http://ruriwujuvuwa.epizy.com/contract_of_employment_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/lawrence_taxonomy_of_vascular_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/35982219368.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/the_champions_mind_book_amazon.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/backbeat_fit_350_blue_review.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000181bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181BF 5688 bytes
SHA-256: 072e5421efaf3eeac5d2549d7acbdcb701f4415fc74c78cbb6e6e253b7449366
font_01_sfnt_off0001952f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1952F 11256 bytes
SHA-256: 12c8e5bf20d8cd0650d1679779fcee2a91aa8142251ffa69ac934e52d1c1fe05

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