Malicious PDF — malware analysis report

Static analysis result for SHA-256 f114868186fbe336…

MALICIOUS

PDF

88.4 KB Created: 2021-02-06 09:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f688eabad7755934e1bd4f99f8d888dd SHA-1: dc4ee97a640d64901ec55f6264396524091c02c7 SHA-256: f114868186fbe336b98aa151bff08994e5b8541d232d99012a0c0e4df2e42b92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector URL, 'https://crophysi.ru/aws?utm_term=contemplate+meaning+in+persian'. This, combined with a critical heuristic firing for a malicious redirector and a high ML classifier score, strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that appears to be a lure related to contemplating meaning, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/aws?utm_term=contemplate+meaning+in+persian In PDF document text
    • https://cdn.sqhk.co/sunawopi/wIcuHjf/zatanavesiz.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/1lhfa5K/walking_dead_no_man_s_land_weapons_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/PghnhbH/bkash_quiz_winner.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/hCgcjen/cara_top_up_diamond_ml_yang_murah.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/jfhbhdB/water_slide_extreme_jumper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/89569860783.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/keduxoperosar.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/12061196524.pdfIn PDF document text
    • http://gosigolixadi.rf.gd/wumerobaxerowomajodato.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/job_application_form_sample_answers.pdfIn PDF document text
    • http://refowokewip.rf.gd/integer_operations_worksheet.pdfIn PDF document text
    • http://lojosikol.epizy.com/xopaxek.pdfIn PDF document text
    • http://kozifina.epizy.com/canada_visa_form_5257_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/libutegogepe.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/caspian_report_bias.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/bollywood_flashback_bally_sagoo_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/gifiziriri.pdfIn PDF document text
    • http://bobupugarini.epizy.com/lijenefelegelokibeso.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001245c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1245C 26008 bytes
SHA-256: 79a0c879605c3cbf74eed7b89f324c8b6b57d65dd18bb8750f3001b1a1790d77
font_00_sfnt_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 5044 bytes
SHA-256: cd9cbbf78ca87c4ebdea873d71e59b01959c5f554f40162cf880ba169a784d3b
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 10832 bytes
SHA-256: 43047f5d8921944f2cebd3acfc4b260cd79f4c91b7eacb9566b8417a2b1b580d

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