Malicious PDF — malware analysis report

Static analysis result for SHA-256 199d14b9ee473823…

MALICIOUS

PDF

82.6 KB Created: 2021-04-25 19:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6ee80b2957d8ef721a1a9f4757af4b0f SHA-1: 2341bfb1046e57bfc002463669392f447a5e5e63 SHA-256: 199d14b9ee4738236fd7f14eba102c9c7b51be30bdbab97b9c1a2e31168c4c28
186 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 large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary malicious URL identified is https://pelibifir.ru/strik, which is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://pelibifir.ru/strik?utm_term=what+do+top+lawyers+charge+per+hour PDF link annotation
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/fodita.pdfIn PDF document text
    • https://zawibovime.weebly.com/uploads/1/3/2/6/132681883/c841a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384460/normal_5fcea5a4ccf84.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/nasebipomodebowower.pdfIn PDF document text
    • http://mybestchan.online/arduino_uno_software_pwmhxwa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_604e30b41137d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_5fe72a359e191.pdfIn PDF document text
    • http://lovechat24.club/metal_slug_3_xbox_360_backwards_compatibilityexqc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_606d680925de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_606debe1d4694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422909/normal_5fc865248c57e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_60312e0eb4c64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_fbfa89685a1e4f1b94cb0074d945d3cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuwosil/48129036814.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_86c2b7d1f4f042e3b8faaf45d8a8b00c.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_0e9c9f79ed4b42ca9bdfbbe9f237bdc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/towakog/pusex.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/cheung_kong_holdings_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/cheap_thrills_lyrics_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/51785921025.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_e89bfbdacb744071a03a79ae99926c1b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 5272 bytes
SHA-256: d3ed5f21d014c896cccd89c33f1085b6b6655390bb43c799e4adda90792c3fef
font_01_sfnt_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 11656 bytes
SHA-256: b9a2405682d482847e7c306228f00937907569e8680c49a0536622b606fe7baf
font_02_sfnt_off00012d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D49 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333