Malicious PDF — malware analysis report

Static analysis result for SHA-256 b828a671f5327400…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 02:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5c70541f88c392065ca05211b08f5397 SHA-1: 21d24d5f135ffa67a9cd94efa836086e6854a9ce SHA-256: b828a671f5327400a66187d3d03edcd09862dd078b14916c842da530157a6e1a
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The presence of a 'download button' heuristic further suggests a lure-based attack. No scripts were extracted, but the overall structure and heuristics point to a phishing or trojan delivery mechanism.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=the+magicians+netflix+rating PDF link annotation
    • http://ejinaya.com/htc_one_m8_battery_resetfk7j4.pdfIn PDF document text
    • http://igafnd.org/your_wish_is_my_command_meaning_in_kannada36ych.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_6016948a8678f.pdfIn PDF document text
    • http://shlifovka-pol.website/sig_p938_reliability_issuessq3yy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5ff89b52dd1a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5ff51a0872da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5fd635c6545a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_6000f3e5da853.pdfIn PDF document text
    • http://jopkapopka.online/88275757816ai3ja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489404/normal_5fed9c328d907.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/zivabuvudemufekojusipuke.pdfIn PDF document text
    • http://wordsideget.top/how_much_is_barista_trainingpohxk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fe723c273e75.pdfIn PDF document text
    • http://everydayy.fun/troy_bilt_generator_xp_7000_manualn1rhw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemigososefof.atwebpages.com/novel_outline_template_google_docs.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/samsung_55_inch_led_box_dimensions.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/the_long_goodbye_raymond_chandler_analysis.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_off0000e7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 5312 bytes
SHA-256: 202e90e80758c6ba023e42534f2cc99c6754c35e4a277ec75279f757c622acee
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 11796 bytes
SHA-256: c84b0e6df1421f4d9e0df4909662287b9f428c033efc818c552cadfa4e8f322a

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