Malicious PDF — malware analysis report

Static analysis result for SHA-256 6033dd138d5a0f3c…

MALICIOUS

PDF

79.8 KB Created: 2021-04-02 01:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5dda2acafe784da5fc02474ab89dd8cf SHA-1: 613fd7e3e3541b01308b7f928b27be7091039602 SHA-256: 6033dd138d5a0f3cffaa8ec4a8ede624487d4f6e5921c643fd5e6335a09a4a3c
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with multiple external URLs, suggesting an attempt to redirect users to malicious sites. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/award?keyword=d+d+5e+character+sheet+pdf+download PDF link annotation
    • http://subbellassecret.com/whale_talk_chapter_10_summaryyaen4.pdfIn PDF document text
    • http://snapchat-alert.com/64695602490128vf.pdfIn PDF document text
    • http://dirtygirl.fun/talobuzenafotakobazadqc2qg.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/TXJifig/score_hero_level_207_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/idNxdzy/68245384140.pdfIn PDF document text
    • http://zijafanovidiz.sportsontheweb.net/cengel_termodinamica_8_edicion.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/ef7gcXR/93982996623.pdfIn PDF document text
    • http://remont-kholodilnikov.website/29398567242rvw9p.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/77743166312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d96a02-9b3a-447d-b4fe-a989a0ba62e6/how_to_write_research_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e81a800-d4b8-402e-9392-03647555c018/sylvia_day_crossfire_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e824f0c6-9ca3-4e79-a011-19144a37382f/white_tiger_casteism.pdfIn PDF document text
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_20c561e6f4e24a38aa27390ffd4d23cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bfcc53-61f7-4384-b061-70fab4f9b35f/introductory_econometrics_wooldridge_data_sets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8196e50b-ed4b-4d3d-aaf1-3642c902a313/18201180327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830c4465-73e6-46dc-b930-fdf2e6a77c0a/libro_desarrollo_humano_papalia_13_edicion.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_5ba56cc9db334ef7881825c49dd78e7b.pdf?index=trueIn 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_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 5456 bytes
SHA-256: 5ae8c54ab42b9f1c2e4e3d1003e703c23e2ce6eadc5edd11d405f251b7071fa6
font_01_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 10820 bytes
SHA-256: aca8de97c96a020aa42c6ce448e216a462f47d6dd0ac66f58f00836b3caaa8ce

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