Malicious PDF — malware analysis report

Static analysis result for SHA-256 821ee82cd3a4328c…

MALICIOUS

PDF

80.7 KB Created: 2021-03-11 13:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bee882f480f7c61517b688f3b59fab78 SHA-1: 187dff51fb79e38a0764f08b6b7b775b5c911bea SHA-256: 821ee82cd3a4328c7bc88f383e58a808a5712032c444e1cd045889e7d05487d4
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-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://baarspo.ru/award?keyword=approximation+questions+pdf+ibps+po+2020 PDF link annotation
    • http://afracheat6.xyz/how_do_you_describe_the_shape_of_a_graph1k0uc.pdfIn PDF document text
    • http://otomail.business/26362546687gyl9v.pdfIn PDF document text
    • http://kemytbok.xyz/python_programming_text_bookw92gi.pdfIn PDF document text
    • http://milanbeach.fun/english_test_b1_readingmfy67.pdfIn PDF document text
    • http://laluwufakiwo.iblogger.org/alkene_reactions.pdfIn PDF document text
    • http://pumadem.iblogger.org/synonyms_antonyms_homonyms_and_homophones.pdfIn PDF document text
    • http://dombitarf.ru/zotoloxirefiwiknpws.pdfIn PDF document text
    • http://gratoraama.website/fanenelonutiwovuxoi73df.pdfIn PDF document text
    • http://robot3.site/35346923284r768s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wutisigila/alton_towers_map_2015.pdfIn PDF document text
    • https://fa0867c9-8cf0-46f9-bfae-aad8e49c21f3.filesusr.com/ugd/cdba2c_5e6d39e0405a4ec881dbfcf469036702.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebisop/rigekuvesobimimilexisul.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/chakravyuh_full_movie_free.pdfIn PDF document text
    • http://rorobifelajew.rf.gd/how_many_volumes_of_dragon_ball_z_are_there.pdfIn PDF document text
    • http://vokoribosid.rf.gd/6416304812.pdfIn PDF document text
    • http://nanolosi.epizy.com/sojut.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_11ecd29170ff41cea3988fdb863e8052.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/how_to_become_a_soccer_goalie.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/appium_desktop_desired_capabilities_for_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC15 5632 bytes
SHA-256: c0c0145c805bf1d8ccae7e145e52f132cb6ef7b9bcac984a8caf1f9f8fc0e17c
font_01_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 11628 bytes
SHA-256: 3554de9a5e5ec0b88baf7cd0de2bf5286734fc35ceb280693aa073ea9cc50149
font_02_sfnt_off000126b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.