Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bb57ac1f74c207…

MALICIOUS

PDF

72.9 KB Created: 2021-03-03 03:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 011f22a7e1aa0391119abd7f02128a3b SHA-1: 1ee31913c32481cc2c9f0aa7cd6c943a6bc70406 SHA-256: d7bb57ac1f74c2079fd050cb70144cd813b7569875338a1348b210af7eb609db
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with high confidence. The embedded URLs and the nature of the heuristic firings suggest a phishing or scam attempt, likely delivered as a spearphishing attachment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=brother+hl-2240+drum+light+on In PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/jibilafikediwaluxagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fde1942bb37c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425010/normal_60230acfca503.pdfIn PDF document text
    • http://airet.space/brother_2270dw_error_lightrw7cd.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/xosifijagiw_xadefebexewazi_visun_zijavopakovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_600f907c59bf3.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/12_steps_program_book.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/kakibeguxakukinivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fed9240b1f95.pdfIn PDF document text
    • https://pefizisiguxuv.weebly.com/uploads/1/3/1/4/131438819/sabolixutopigigawu.pdfIn PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/8348694.pdfIn PDF document text
    • https://bekazavaf.weebly.com/uploads/1/3/5/3/135327011/3106422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizenatoxu.myartsonline.com/logitech_k800_wireless_illuminated_keyboard_2.40ghz_wireless_operating_frequency_black.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/tipetiledodebaluzusikuli.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/arc_length_of_a_sector_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/lifowovib.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/minecraft_map_editor.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_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 5296 bytes
SHA-256: 925960ede23075a039f0b28424a081c4448d1d26b0c92effad3f57d62dc1245a
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 10704 bytes
SHA-256: ae38bf2c7753a4a9f448e6192d61fd63871e01e03ba8c9ac5c438cef605dc3d5

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