Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a650993cf4d7666…

MALICIOUS

PDF

86.7 KB Created: 2021-03-23 07:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 339d3db292f1b0ff8449df014771fcc7 SHA-1: 15ecdf89e33089acfa53050bc7d9e0006d8f4c84 SHA-256: 5a650993cf4d7666a359feb9824f3cbcfaf7ddf4dadd6a6e888bd1242bd1deb8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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 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://soxebez.ru/123?utm_term=property+investment+analysis+report PDF link annotation
    • http://mavurelaro.22web.org/bhagwat_geeta_in_hindi_video_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_6020fd17114c5.pdfIn PDF document text
    • http://noncomform.space/lotigekolemuxipakas1hqeu.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/c107f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413012/normal_5fe5b4002044d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5ff9896012fd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5ffeb5f8d8443.pdfIn PDF document text
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/zudumisebuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fccd0f188220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_60149704bac23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_60278abb9dec0.pdfIn PDF document text
    • http://gisisavodure.22web.org/myspanishlab_extra_practice_answers.pdfIn PDF document text
    • http://presentinsta.site/bawarchi_songs_naaf4j5r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_60354e2ee2f82.pdfIn PDF document text
    • http://study-english-05.site/babuf9urgw.pdfIn PDF document text
    • http://dfwshootersupply.com/citrix_adc_sdx_8920_datasheet6f9d6.pdfIn PDF document text
    • http://kyponnik.online/bts_arirang_song_ilkpopdjdta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_1c9ce966d63c4c4096e884978b2563b1.pdf?index=trueIn PDF document text
    • http://ragekelovu.rf.gd/nutritional_information_basmati_rice_cooked.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_afbfb053e1b446679ade2788291e39e4.pdf?index=trueIn PDF document text
    • http://xepesigatijidix.rf.gd/groom_thank_you_card_template.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_6fe0c27128fc43a8a5f2a508df3bcfc6.pdf?index=trueIn PDF document text
    • http://palomidifigur.epizy.com/velenerevezid.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_off00011642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11642 5128 bytes
SHA-256: d50ff925fed3b826c21341b372bbf085fc35a75f108b6d8cc78416e167298a84
font_01_sfnt_off000127a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A8 11048 bytes
SHA-256: 81e3770370c9d6c6e99c04ba17d0fa2acb0591101a1b53819f8367fb5496f0ae

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