Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ed0f9d4ca0bb46…

MALICIOUS

PDF

76.4 KB Created: 2021-04-20 18:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eefe93dd107291b25dc10bcadcf1cd9a SHA-1: ed1f03c1759513bdf1027df3eb876dcb3ec78860 SHA-256: 11ed0f9d4ca0bb46b6acd8a7f022f0ae46c170643b690958bcff2ebeed384fad
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://mezovuduw.ru/strik?utm_term=ibsen+a+doll%2527s+house+characters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473445/normal_5feb259dd7050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_605c89a4a677f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_606e92202a1d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fc896e39f6f2.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/Ggf61jb/get_real_followers_and_likes_for_instagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc6938d1cfaa.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/maluxibukawabud.pdfIn PDF document text
    • https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/8901470.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/gevRy12/spin_the_wheel_numbers_1-_5.pdfIn PDF document text
    • http://neojust.ru/46899789268juscs.pdfIn PDF document text
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/xenaj.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/9006668.pdfIn PDF document text
    • https://tomosuboma.weebly.com/uploads/1/3/5/3/135382902/nenutu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fc576ad9dcfc.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/f1f1f9d4c.pdfIn PDF document text
    • http://vvinorama.fun/how_to_activate_poll_everywhere_in_powerpointvvinz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6020d29ae1d39.pdfIn PDF document text
    • https://gikusevenax.weebly.com/uploads/1/3/4/5/134529244/6045432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 5136 bytes
SHA-256: 2c3f56b5aee51cfcd10a5970ac5de2ccf0abb792c7e51710ad092c8844311c15
font_01_sfnt_off00010045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10045 10000 bytes
SHA-256: c110f0f3a33a0610624fb2ce3c0fbd67af9c907cdbedebf71bbcea136e82753a

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