Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63d36db748aa308…

MALICIOUS

PDF

72.7 KB Created: 2020-12-16 23:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b2c351f6179e83e82cab22286cd67e3b SHA-1: 21707dd670e4022570918573eac23c36eaa182e7 SHA-256: d63d36db748aa308d4f9f21a83ba1dbdc3c400835725ff6c3f3a600ff032808d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure and a large number of external PDF links, indicating a link farm or distribution mechanism. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URLs suggest an attempt to lure users to potentially harmful content or phishing sites.

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=catch+the+moon+short+story+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5faecf0f7fb57.pdfIn PDF document text
    • https://xafudilolara.weebly.com/uploads/1/3/4/7/134744509/vewepu_bezenirelat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_5fa7ea5e25358.pdfIn PDF document text
    • https://wuvukimepegoj.weebly.com/uploads/1/3/4/6/134694914/ca8e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f993ca9676fb.pdfIn PDF document text
    • https://gomamatugapisum.weebly.com/uploads/1/3/4/3/134392688/3676874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f8f5f2eb8012.pdfIn PDF document text
    • https://pezitojuxesuvog.weebly.com/uploads/1/3/4/6/134608136/saxexurun_nijejabaf_jakoxaxit.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/5fc170aff7cf8c75402ec1d3/t/5fca4d1d887b444c616396a4/1607093533746/design_your_own_room_online_free_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/mumivufubirozamokate.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b8d58ef7301f8b31fd81/t/5fc8504eee804a17a1cd6bcd/1606963278468/304044031.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf567d7acac6192ab7cbf2/1606375038295/colony_netflix_parents_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68006ab79f442f250112e/t/5fce5f5483d2ac65cc46f3a6/1607360341413/monster_hunter_rise_amiibo_armor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b90bc819f1cf4ced185/1606372242231/best_buy_cordless_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/calendrier_retransmission_coupe_du_monde_rugby_2019.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_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 5368 bytes
SHA-256: d041e43f5cb73197d5c2c8b1f50dea7e5c8ae4b609e6b914e1e974de7500bf15
font_01_sfnt_off0000f11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11F 11040 bytes
SHA-256: ff1d8852b45f8a99e9b1c3d0ba7b5175d40d51f2bfb982c4a6a25eecf981969a

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