Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8eb5c73b86abd7…

MALICIOUS

PDF

82.6 KB Created: 2021-05-17 18:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e192130d889da2d389bccd077ad46f8 SHA-1: 222106b3c5599f7dd828d51cd377de9a1fccef17 SHA-256: ea8eb5c73b86abd7693f8ac86f3d411107675fecd73115fae8dbdecb4c3e64b1
186 Risk Score

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 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://dafemum.ru/strik?utm_term=acurite+indoor+outdoor+thermometer+lowes PDF link annotation
    • https://cdn.sqhk.co/tikugosedik/jaggiaY/spirituality_and_health.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/2hgjbhf/jurigarolixidogos.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/nelozumiwavopi.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/vTsPgiQ/retro_outer_space_art.pdfIn PDF document text
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/9501758.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/yhhJMWC/kawarenezipubin.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/hc7tsmK/classic_cartoon_network_shows_app.pdfIn PDF document text
    • https://masizomomom.weebly.com/uploads/1/3/2/6/132681315/3c7116a6e7d70.pdfIn PDF document text
    • http://fisidijomufuto.22web.org/dawn_of_titans_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/ihaCygd/timokafofovonokokutuwodo.pdfIn PDF document text
    • http://mozodulo.iblogger.org/criminal_defense_attorneys_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/gdHieru/kivederalazuv.pdfIn PDF document text
    • https://jevoweli.weebly.com/uploads/1/3/5/9/135958856/jutaja-lusikit-vuwono-sozukedidopeb.pdfIn PDF document text
    • https://bumiwawewa.weebly.com/uploads/1/3/5/3/135343946/josejawemigolagufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/xiwofoluvekubukezukere.pdfIn PDF document text
    • http://gulesovel.epizy.com/attack_the_block_full_movie.pdfIn PDF document text
    • http://pumuroxojab.rf.gd/uppercase_alphabet_letters_worksheets.pdfIn PDF document text
    • http://lodavudomajip.epizy.com/90607435962.pdfIn PDF document text
    • http://mipuxezodovepe.rf.gd/nelajaresosizixarusobupa.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/bixos.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_off00010579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10579 5052 bytes
SHA-256: 59c066be9104a12355584bcf2053e1e6131d567d266dc48da4e87a185cd04081
font_01_sfnt_off0001168d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168D 10780 bytes
SHA-256: 4c29834a60ea1c2c24fc530ae3e748fd1e0da39ed7ab4a8935c0bdeb830daeb9

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