Malicious PDF — malware analysis report

Static analysis result for SHA-256 d584b9775e133b83…

MALICIOUS

PDF

69.4 KB Created: 2020-12-16 21:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2f1a96ff2057794e24fb8215d5b55d75 SHA-1: 023a8d1c1ae920cda735bdbcc185f13604c9e564 SHA-256: d584b9775e133b83b0d93f3efafe28f3e1b00fb331e91cbc0cdf42d40a41fbb1
262 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to urgency and password-protected archives, suggesting a phishing or credential harvesting attempt. The presence of embedded URLs, one of which points to a malicious redirector, indicates an attempt to lead the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/123?utm_term=what+is+a+cherry+bomb+pepper In PDF document text
    • https://muxalogedidu.weebly.com/uploads/1/3/4/3/134358485/vidusax.pdfIn PDF document text
    • https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/db756aca8fcdf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5886bc819f1cf4cfb483/1606375559012/nukoniba.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc360b6bda9c57a97cdfd08/t/5fcc142d978da30c56eba092/1607210030074/gexowabinen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cc51df132613bbdf24a4/t/5fc9665828e47b5d5023b184/1607034456739/32478105327.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5888ba13a450bab13d611/t/5fceec1b3fa051062b3a2567/1607396380459/truck_racing_game_for_pc_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0fd0b474932ca26a4743/1606225874157/essay_topics_for_the_outsiders.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc781772122570d580291d1/t/5fcd4f1dc00f007ceaf722ff/1607290653670/are_there_mini_games_in_gardenscapes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc9aee652b5874c858e15e7/1607053031904/android_app_to_hide_files_on_sd_card.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6719cb3e0f577147a506/1606379289696/51958463615.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_off0000d228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD228 5396 bytes
SHA-256: 5d450330dff5d8fb7cf82e46dd1ba1d4c28cb0789b74ec366682820a303347c0
font_01_sfnt_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 11284 bytes
SHA-256: 05faccf963c5375fe5224cd68aee221ab61383b4023a4966ec144665f3f7c5b8

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