Malicious PDF — malware analysis report

Static analysis result for SHA-256 727780247a15f3d0…

MALICIOUS

PDF

66.6 KB Created: 2021-05-11 22:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f77f7f92ca91a76a9504cfe8fcb22fdb SHA-1: 2d661a02f4569d3ee2f908155d9eb0c1ffdb53ce SHA-256: 727780247a15f3d084588e21fb225705747576ddc2fc2d1a6825643d708b06c9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9227

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.
  • 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
  • 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://mezovuduw.ru/strik?utm_term=which+reconstruction+plan+was+better PDF link annotation
    • http://fojedera.22web.org/40888421494.pdfIn PDF document text
    • http://xibijawex.iblogger.org/oxford_handbook_clinical_pharmacy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_c3da532e908344f88b94a826e72e8fd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6208b2ec-94fc-4ea0-9490-efef97d8f3a5/zobut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff81ca8-f6d6-4442-91d9-de7ed4f7d09d/who_has_the_least_lines_in_julius_caesar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc361b71-98f1-4a68-bde7-2c8f8c2b6c59/kobalt_10-in_wet_tabletop_sliding_table_tile_saw_with_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f45e4fe-b6ca-4c33-8128-18b5f9305c3f/que_es_evangelizar_y_cual_es_su_importancia.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/66034154309.pdfIn PDF document text
    • http://pojesonedako.epizy.com/hound_of_the_baskervilles_book_cover.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_dfb3d9867724429c91ce47c10d78a52d.pdf?index=trueIn PDF document text
    • http://nomekerileme.epizy.com/betirufuzodolivubi.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_74b1d791f60a4563b541b1c33f7720e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xetasif/network_controller_driver_for_dell_latitude_e6410_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/grammar_translation_method_characteristics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819ecd39-cb13-4bfb-a8b2-30eeaf4e3fee/53665042506.pdfIn PDF document text
    • http://kojaburu.epizy.com/nugitosaxafuzanuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3718d65e-e474-4a1e-9726-1270d5178fa5/virepezejijizotavazule.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_dd73d02b1a564ae596dbc4f469be2dcc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8f6919-17b2-4d8b-8ffd-d51f91378d2d/konovirafi.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/mabovali.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/answer_to_the_epicurean_paradox.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/89508987887.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/85350924459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebee1e7a-ff76-4063-b083-8a4417304bd9/81070672370.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/mozikanofezubetiruwoju.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 5264 bytes
SHA-256: 24b3e4bde72611852def3847f3ae3ce64976e7ac3c1f87413e3e6620ff7977ba

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