Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baeeb0df49d62ec…

MALICIOUS

PDF

73.8 KB Created: 2021-03-17 19:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 719d35bb2301e0c173ee0c03a5c29a95 SHA-1: 72bb5e12f2394afdc373d6b66528720c6bcc987c SHA-256: 8baeeb0df49d62ec8c047aa89b4e901bf8b4a08a5c2e0895b98c02b0de8b3f6d
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 0.9993

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://jacksth.ru/123?utm_term=statistical+analysis+software+sas+pdf PDF link annotation
    • https://cdn.sqhk.co/zejejofe/jgshhgd/interesting_facts_about_american_states.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/gfihThe/tofunurepal.pdfIn PDF document text
    • http://xizabif.22web.org/interview_skills_telugu.pdfIn PDF document text
    • http://pukogika.iblogger.org/minecraft_guide_to_redstone_book.pdfIn PDF document text
    • http://rotixumuzu.22web.org/56590868523.pdfIn PDF document text
    • http://gesufumepemu.22web.org/viduduxopefo.pdfIn PDF document text
    • http://jomufobi.iblogger.org/technical_chart_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_df80a2a8a5b449d497832734f072a191.pdf?index=trueIn PDF document text
    • http://xanokilil.rf.gd/john_deere_x500_power_flow_bagger_manual.pdfIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_971b9d1f475d4343a33a531f65da9068.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/robopibibejevimotemi.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_a80f0852b3824ef69ed02826c7429551.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gumagabu/year_6_end_of_year_report_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/polk_magnifi_max_review_cnet.pdfIn PDF document text
    • http://sedijinuv.epizy.com/40851906633.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/animals_song_ringtone_for_android.pdfIn PDF document text
    • http://beritoka.rf.gd/combahee_river_collective_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/52272833556.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/97552631756.pdfIn PDF document text
    • http://xolelapideruse.epizy.com/41715712686.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/hunger_games_minecraft_pe_map.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/guidelines_for_pap_smears_and_mammograms.pdfIn PDF document text
    • http://dulawazege.rf.gd/75594311694.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_off0000e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 5448 bytes
SHA-256: 7cea383d266f3bf2774e9d11ffaaf597b2adabccfdf0da7794cef3b5a54a9f40
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 10756 bytes
SHA-256: da4f6306f6380431844f1fed8e29c434a97841169c5163ef5d59b4fe6fc0cae4

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